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@ -1,5 +1,5 @@
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x11vnc README file Date: Sun Apr 3 16:28:59 EDT 2005
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x11vnc README file Date: Sun Apr 10 00:24:10 EDT 2005
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The following information is taken from these URLs:
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The following information is taken from these URLs:
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@ -97,15 +97,22 @@ x11vnc: a VNC server for real X displays
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You could have also set the environment variable DISPLAY=:0 instead of
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You could have also set the environment variable DISPLAY=:0 instead of
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using -display. This step attaches x11vnc to the far-away.east:0 X
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using -display. This step attaches x11vnc to the far-away.east:0 X
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display (no viewer clients yet).
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display (i.e. no viewer clients yet).
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To get X11 permissions right, you may also need to set the XAUTHORITY
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To get X11 permissions right, you may also need to set the XAUTHORITY
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environment variable (or use the [12]-auth option) to point to the
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environment variable (or use the [12]-auth option) to point to the
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correct MIT-MAGIC-COOKIE file (e.g. /home/joe/.Xauthority). More on
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correct MIT-MAGIC-COOKIE file (e.g. /home/joe/.Xauthority). More on
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this [13]below.
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this [13]below.
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There will then be much chatter printed out from x11vnc, until it
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If you suspect an X11 permissions problem do this simple test: while
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finally says something like:
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sitting at the physical X display open a terminal window
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(gnome-terminal, xterm, etc). You should be able to start x11vnc
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without any need for command line options in that terminal. If that
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works OK then you know X11 permissions are the only thing preventing
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it from working when you try to start x11vnc via a remote shell.
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When x11vnc starts up there will then be much chatter printed out,
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until it finally says something like:
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.
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.
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.
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.
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13/05/2004 14:59:54 Autoprobing selected port 5900
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13/05/2004 14:59:54 Autoprobing selected port 5900
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@ -1021,14 +1028,24 @@ make
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specify it. Nearly always the correct value will be ":0"
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specify it. Nearly always the correct value will be ":0"
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For the latter error, you need to set up the X11 permissions
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For the latter error, you need to set up the X11 permissions
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correctly. See the xauth(1), Xsecurity(7), and xhost(1) man pages for
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correctly.
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much info. For example, you may need to set your XAUTHORITY
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environment variable or use the [142]-auth option to point to the
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To make sure X11 permissions are the problem do this simple test:
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correct cookie file (e.g. /home/joe/.Xauthority or /var/gdm/:0.Xauth),
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while sitting at the physical X display open a terminal window
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or simply be sure you run x11vnc as the correct user (i.e. the user
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(gnome-terminal, xterm, etc). You should be able to start x11vnc
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who owns the X session you wish to view). Running x11vnc as root is
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without any need for special steps or command line options in that
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not enough: you need to know where the XAUTHORITY file for the desired
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terminal. If that works OK then you know X11 permissions are the only
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X display is. Example:
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thing preventing it from working when you try to start x11vnc via,
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say, a remote shell.
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How to Solve: See the xauth(1), Xsecurity(7), and xhost(1) man pages
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for much info on X11 permissions. For example, you may need to set
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your XAUTHORITY environment variable or use the [142]-auth option to
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point to the correct cookie file (e.g. /home/joe/.Xauthority or
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/var/gdm/:0.Xauth), or simply be sure you run x11vnc as the correct
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user (i.e. the user who owns the X session you wish to view). Running
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x11vnc as root is not enough: you need to know where the XAUTHORITY
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file for the desired X display is. Example:
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x11vnc -display :0 -auth /var/gdm/:0.Xauth
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x11vnc -display :0 -auth /var/gdm/:0.Xauth
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Less safe, but to avoid figuring out where the XAUTHORITY file is, if
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Less safe, but to avoid figuring out where the XAUTHORITY file is, if
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@ -1036,24 +1053,26 @@ make
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should be able to attach x11vnc to the session (from the same
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should be able to attach x11vnc to the session (from the same
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machine). The person could then type "xhost -localhost" after x11vnc
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machine). The person could then type "xhost -localhost" after x11vnc
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has connected to go back to the default permissions. Also, for some
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has connected to go back to the default permissions. Also, for some
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situations the -users lurk= option may be of use (please read the
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situations the "-users lurk=" option may be of use (please read the
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documentation on the [143]-users option).
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documentation on the [143]-users option).
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To test out your X11 permissions, set DISPLAY and possibly XAUTHORITY
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To test out your X11 permissions from a remote shell, set DISPLAY and
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(see your shell's man page, bash(1), tcsh(1), on how to set
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possibly XAUTHORITY (see your shell's man page, bash(1), tcsh(1), on
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environment variables) and type xdpyinfo in the same place you will be
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how to set environment variables) and type xdpyinfo in the same place
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typing (or otherwise running) x11vnc. If information is printed out
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you will be typing (or otherwise running) x11vnc. If information is
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about the X display (screen sizes, supported extensions, color visuals
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printed out about the X display (screen sizes, supported extensions,
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info) that means the X11 permissions are set up properly: xdpyinfo
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color visuals info) that means the X11 permissions are set up
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successfully connected to DISPLAY. You could also type xclock and make
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properly: xdpyinfo successfully connected to DISPLAY! You could also
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sure no errors are reported (a clock should appear on the X display,
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type xclock and make sure no errors are reported (a clock should
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type Ctrl-C to quit it)
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appear on the X display, press Ctrl-C to stop it). If these work, then
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typing "x11vnc" should also work.
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Important: if you cannot get your X11 permissions so that the xdpyinfo
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Important: if you cannot get your X11 permissions so that the xdpyinfo
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or xclock tests work, x11vnc also will not work (all of these X
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or xclock tests work, x11vnc also will not work (all of these X
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clients must be allowed to connect to the X server to function
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clients must be allowed to connect to the X server to function
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properly).
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properly).
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Q-2: I can't get x11vnc and/or libvncserver to compile.
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Q-2: I can't get x11vnc and/or libvncserver to compile.
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Make sure you have all of the required -devel packages installed.
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Make sure you have all of the required -devel packages installed.
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@ -1092,6 +1111,7 @@ make
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XFree86-devel
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XFree86-devel
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zlib-devel
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zlib-devel
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Q-3: I just built x11vnc successfully, but when I use it my keystrokes
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Q-3: I just built x11vnc successfully, but when I use it my keystrokes
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and mouse button clicks are ignored (I am able to move the mouse
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and mouse button clicks are ignored (I am able to move the mouse
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though).
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though).
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@ -1131,6 +1151,7 @@ h
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20/03/2005 22:33:09 No XTEST extension, switching to -xwarppointer mode for
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20/03/2005 22:33:09 No XTEST extension, switching to -xwarppointer mode for
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20/03/2005 22:33:09 pointer motion input.
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20/03/2005 22:33:09 pointer motion input.
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Q-4: Help, I need to run x11vnc on Solaris 2.5.1 (or other old
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Q-4: Help, I need to run x11vnc on Solaris 2.5.1 (or other old
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Unix/Linux) and it doesn't compile!
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Unix/Linux) and it doesn't compile!
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@ -1177,6 +1198,7 @@ typedef unsigned int in_addr_t;
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it worked or not). If there is enough demand we will try to push clean
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it worked or not). If there is enough demand we will try to push clean
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compilations back to earlier Solaris, Linux, etc, releases.
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compilations back to earlier Solaris, Linux, etc, releases.
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Q-5: Where can I get a precompiled x11vnc binary for my Operating
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Q-5: Where can I get a precompiled x11vnc binary for my Operating
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System?
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System?
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@ -1225,6 +1247,7 @@ typedef unsigned int in_addr_t;
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resulting data.tar.gz tar file. Also, rpm2cpio(1) is useful in
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resulting data.tar.gz tar file. Also, rpm2cpio(1) is useful in
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extracting files from rpm packages.
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extracting files from rpm packages.
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Q-6: Where can I get a VNC Viewer binary (or source code) for the
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Q-6: Where can I get a VNC Viewer binary (or source code) for the
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Operating System I will be viewing from?
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Operating System I will be viewing from?
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@ -1234,6 +1257,7 @@ typedef unsigned int in_addr_t;
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* [156]http://www.realvnc.com/download-free.html
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* [156]http://www.realvnc.com/download-free.html
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* [157]http://sourceforge.net/projects/cotvnc/
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* [157]http://sourceforge.net/projects/cotvnc/
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Q-7: How can I see all of x11vnc's command line options and
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Q-7: How can I see all of x11vnc's command line options and
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documentation on how to use them?
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documentation on how to use them?
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@ -1241,6 +1265,7 @@ typedef unsigned int in_addr_t;
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-help for long descriptions about each option. The output is listed
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-help for long descriptions about each option. The output is listed
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[158]here as well.
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[158]here as well.
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Q-8: I don't like typing arcane command line options every time I
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Q-8: I don't like typing arcane command line options every time I
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start x11vnc. What can I do? Is there a config file? Or a GUI?
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start x11vnc. What can I do? Is there a config file? Or a GUI?
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@ -1275,6 +1300,7 @@ display :0
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"x11vnc ... -gui other:0" in the latter case the gui is displayed on
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"x11vnc ... -gui other:0" in the latter case the gui is displayed on
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other:0, not the X display x11vnc is polling.
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other:0, not the X display x11vnc is polling.
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Q-9: Can I make x11vnc more quiet and also go into the background
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Q-9: Can I make x11vnc more quiet and also go into the background
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after starting up?
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after starting up?
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@ -1284,6 +1310,7 @@ display :0
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Note that under -bg the stderr messages will be lost unless you use
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Note that under -bg the stderr messages will be lost unless you use
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the "[162]-o logfile" option.
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the "[162]-o logfile" option.
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Q-10: Sometimes when a VNC viewer dies abruptly, x11vnc also dies with
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Q-10: Sometimes when a VNC viewer dies abruptly, x11vnc also dies with
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the error message like: "Broken pipe". I'm using the -forever mode and
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the error message like: "Broken pipe". I'm using the -forever mode and
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I want x11vnc to keep running.
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I want x11vnc to keep running.
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@ -1297,6 +1324,7 @@ display :0
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[163]x11vnc.c file. It also has an [164]option -sigpipe exit to have
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[163]x11vnc.c file. It also has an [164]option -sigpipe exit to have
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x11vnc clean up and exit upon receiving SIGPIPE.
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x11vnc clean up and exit upon receiving SIGPIPE.
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Q-11: Are there any build-time customizations possible, e.g. change
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Q-11: Are there any build-time customizations possible, e.g. change
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defaults, create a smaller binary, etc?
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defaults, create a smaller binary, etc?
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@ -1318,6 +1346,14 @@ display :0
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If other things (e.g. "-I ...") are needed in CPPFLAGS add them as
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If other things (e.g. "-I ...") are needed in CPPFLAGS add them as
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well.
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well.
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Be careful the the following two variables: HARDWIRE_PASSWD and
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HARDWIRE_VIEWPASSWD. If set (remember to include the double quotes
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around the string), they will be used as default values for the
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-passwd and -viewpasswd options. Of course the strings will exist
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unobscured in the x11vnc: the binary better not be readable by
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unintendeds. Perhaps this is of use in remote access for an embedded
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application, etc...
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Let us know if more build-time customizations would be useful.
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Let us know if more build-time customizations would be useful.
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If the system does not have the XTEST XTestGrabControl interface (some
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If the system does not have the XTEST XTestGrabControl interface (some
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@ -1357,6 +1393,7 @@ display :0
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All of them will work with x11vnc (except x2x where it is not needed).
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All of them will work with x11vnc (except x2x where it is not needed).
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Q-13: I am running Win2VNC on my Windows machine and "x11vnc -nofb" on
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Q-13: I am running Win2VNC on my Windows machine and "x11vnc -nofb" on
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Unix to pass keyboard and mouse to the Unix monitor. Whenever I start
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Unix to pass keyboard and mouse to the Unix monitor. Whenever I start
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Win2VNC it quickly disconnects and x11vnc says:
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Win2VNC it quickly disconnects and x11vnc says:
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@ -1401,6 +1438,7 @@ display :0
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non-zero in 8bpp PseudoColor on an obscure setup, and this option
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non-zero in 8bpp PseudoColor on an obscure setup, and this option
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corrected the problems.
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corrected the problems.
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Q-15: Color problems: Why are the colors for some windows messed up in
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Q-15: Color problems: Why are the colors for some windows messed up in
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x11vnc? BTW, my X display has nice overlay/multi-depth visuals of
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x11vnc? BTW, my X display has nice overlay/multi-depth visuals of
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different color depths: e.g. there are both depth 8 and 24 visuals
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different color depths: e.g. there are both depth 8 and 24 visuals
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@ -1480,6 +1518,7 @@ TrueColor defdepth 24
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[182]-overlay option works for Solaris machines with overlay visuals
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[182]-overlay option works for Solaris machines with overlay visuals
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where most of this problem occurs.
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where most of this problem occurs.
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Q-16: How do I figure out the window id to supply to the -id windowid
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Q-16: How do I figure out the window id to supply to the -id windowid
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option?
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option?
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@ -1498,6 +1537,7 @@ TrueColor defdepth 24
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extracts the windowid. Besides "pick" there is also "id:root" to allow
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extracts the windowid. Besides "pick" there is also "id:root" to allow
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you to go back to root window when doing remote-control.
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you to go back to root window when doing remote-control.
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Q-17: Why don't menus or other transient windows come up when I am
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Q-17: Why don't menus or other transient windows come up when I am
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using the -id windowid option to view a single application window?
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using the -id windowid option to view a single application window?
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@ -1515,6 +1555,7 @@ TrueColor defdepth 24
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x11vnc is known to crash under both -id and -sid, so both modes are
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x11vnc is known to crash under both -id and -sid, so both modes are
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still experimental. Please report any reproducible bugs.
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still experimental. Please report any reproducible bugs.
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Q-18: My X display is depth 24 at 24bpp (instead of the normal depth
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Q-18: My X display is depth 24 at 24bpp (instead of the normal depth
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24 at 32bpp). I'm having lots of color and visual problems with x11vnc
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24 at 32bpp). I'm having lots of color and visual problems with x11vnc
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and/or vncviewer. What's up?
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and/or vncviewer. What's up?
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@ -1673,6 +1714,7 @@ TrueColor defdepth 24
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Alt. Alternatively, the [196]-clear_mods option and [197]-clear_keys
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Alt. Alternatively, the [196]-clear_mods option and [197]-clear_keys
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option can be used to release pressed keys at startup and exit.
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option can be used to release pressed keys at startup and exit.
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Q-22: Can I change settings in x11vnc without having to restart it?
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Q-22: Can I change settings in x11vnc without having to restart it?
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Can I remote control it?
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Can I remote control it?
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@ -1718,6 +1760,7 @@ TrueColor defdepth 24
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text (i.e. not obscured like the -rfbauth VNC passwords) password
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text (i.e. not obscured like the -rfbauth VNC passwords) password
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options.
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options.
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Q-24: Can I have two passwords for VNC viewers, one for full access
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Q-24: Can I have two passwords for VNC viewers, one for full access
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and the other for view-only access to the display?
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and the other for view-only access to the display?
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@ -1745,6 +1788,7 @@ TrueColor defdepth 24
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plain text passwords from $HOME/.vnc/passwd since it is very
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plain text passwords from $HOME/.vnc/passwd since it is very
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straight-forward to work out what to do from the VNC source code.
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straight-forward to work out what to do from the VNC source code.
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Q-25: Can I fine tune what types of user input are allowed? E.g. have
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Q-25: Can I fine tune what types of user input are allowed? E.g. have
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some users just be able to move the mouse, but not click or type
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some users just be able to move the mouse, but not click or type
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anything?
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anything?
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@ -1758,6 +1802,7 @@ TrueColor defdepth 24
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These settings can also be applied on a per-viewer basis via the
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These settings can also be applied on a per-viewer basis via the
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remote control mechanism or the GUI. E.g. x11vnc -R input:hostname:M
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remote control mechanism or the GUI. E.g. x11vnc -R input:hostname:M
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Q-26: Why does x11vnc exit as soon as the VNC viewer disconnects? And
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Q-26: Why does x11vnc exit as soon as the VNC viewer disconnects? And
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why doesn't it allow more than one VNC viewer to connect at the same
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why doesn't it allow more than one VNC viewer to connect at the same
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time?
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time?
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@ -1776,6 +1821,7 @@ TrueColor defdepth 24
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apply these security measures, they will not be done for you
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apply these security measures, they will not be done for you
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automatically.
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automatically.
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Q-27: Can I limit which machines incoming VNC clients can connect
|
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Q-27: Can I limit which machines incoming VNC clients can connect
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from?
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from?
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@ -1794,6 +1840,7 @@ TrueColor defdepth 24
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[216](tcp_wrappers) and then use /etc/hosts.allow See hosts_access(5)
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[216](tcp_wrappers) and then use /etc/hosts.allow See hosts_access(5)
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for complete details.
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for complete details.
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Q-28: How do I build x11vnc/libvncserver with libwrap (tcp_wrappers)
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Q-28: How do I build x11vnc/libvncserver with libwrap (tcp_wrappers)
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support?
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support?
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@ -1814,6 +1861,7 @@ TrueColor defdepth 24
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x11vnc with libwrap support because the /usr/sbin/tcpd reference in
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x11vnc with libwrap support because the /usr/sbin/tcpd reference in
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/etc/inetd.conf handles the tcp_wrappers stuff.
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/etc/inetd.conf handles the tcp_wrappers stuff.
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Q-29: Can I have x11vnc only listen on one network interface (e.g.
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Q-29: Can I have x11vnc only listen on one network interface (e.g.
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internal LAN) rather than having it listen on all network interfaces
|
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internal LAN) rather than having it listen on all network interfaces
|
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|
and relying on -allow to filter unwanted connections out?
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and relying on -allow to filter unwanted connections out?
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@ -1830,6 +1878,7 @@ TrueColor defdepth 24
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option [220]-localhost now implies "-listen localhost" since that is
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option [220]-localhost now implies "-listen localhost" since that is
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what most people expect it to do.
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what most people expect it to do.
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Q-30: Now that -localhost implies listening only on the loopback
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Q-30: Now that -localhost implies listening only on the loopback
|
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interface, how I can occasionally allow in a non-localhost via the
|
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interface, how I can occasionally allow in a non-localhost via the
|
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allowonce remote control command?
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allowonce remote control command?
|
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@ -1847,6 +1896,7 @@ TrueColor defdepth 24
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in on the listening interface. If you just toggle [225]-localhost on
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in on the listening interface. If you just toggle [225]-localhost on
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and off x11vnc should see to it that you never get into such a state.
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and off x11vnc should see to it that you never get into such a state.
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Q-31: How can I tunnel my connection to x11vnc via an encrypted SSH
|
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Q-31: How can I tunnel my connection to x11vnc via an encrypted SSH
|
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|
channel between two Unix machines?
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channel between two Unix machines?
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@ -1857,6 +1907,7 @@ TrueColor defdepth 24
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Other secure encrypted methods exists, e.g. stunnel, IPSEC, various
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Other secure encrypted methods exists, e.g. stunnel, IPSEC, various
|
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VPNs, etc.
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VPNs, etc.
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Q-32: How can I tunnel my connection to x11vnc via an encrypted SSH
|
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Q-32: How can I tunnel my connection to x11vnc via an encrypted SSH
|
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|
channel from Windows using an SSH client like Putty?
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channel from Windows using an SSH client like Putty?
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|
@ -1900,6 +1951,7 @@ TrueColor defdepth 24
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5500 instead of 5900 (i.e. 'Source port: 5500' and
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5500 instead of 5900 (i.e. 'Source port: 5500' and
|
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|
'Destination: localhost:5500' for a Remote connection).
|
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'Destination: localhost:5500' for a Remote connection).
|
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Q-33: Can I prompt the user at the local X display whether the
|
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|
Q-33: Can I prompt the user at the local X display whether the
|
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|
incoming VNC client should be accepted or not? Can I decide to make
|
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incoming VNC client should be accepted or not? Can I decide to make
|
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|
some clients view-only? How about running an arbitrary program to make
|
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|
some clients view-only? How about running an arbitrary program to make
|
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|
@ -1994,6 +2046,7 @@ exit 1
|
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|
variables are set as in "-accept command" (except that RFB_MODE will
|
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|
variables are set as in "-accept command" (except that RFB_MODE will
|
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be "gone").
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be "gone").
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Q-34: Does x11vnc support Unix usernames and passwords? Can I further
|
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Q-34: Does x11vnc support Unix usernames and passwords? Can I further
|
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|
limit the set of Unix usernames who can connect to the VNC desktop?
|
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|
limit the set of Unix usernames who can connect to the VNC desktop?
|
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@ -2045,6 +2098,7 @@ exit 1 # reject it
|
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|
For this to work with ssh port redirection, the ssh option
|
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|
For this to work with ssh port redirection, the ssh option
|
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|
UsePrivilegeSeparation must be enabled.
|
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|
UsePrivilegeSeparation must be enabled.
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Q-35: I start x11vnc as root because it is launched via inetd(1) or a
|
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|
|
Q-35: I start x11vnc as root because it is launched via inetd(1) or a
|
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|
|
display manager like gdm(1). Can I have x11vnc later switch to a
|
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|
|
display manager like gdm(1). Can I have x11vnc later switch to a
|
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|
|
different user?
|
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|
different user?
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|
@ -2056,6 +2110,7 @@ exit 1 # reject it
|
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|
+nobody" that switches to the Unix user nobody right after connections
|
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|
+nobody" that switches to the Unix user nobody right after connections
|
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to the X display are established.
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to the X display are established.
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Q-36: I use a screen-lock when I leave my workstation (e.g.
|
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|
Q-36: I use a screen-lock when I leave my workstation (e.g.
|
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|
|
xscreensaver or xlock). When I remotely access my workstation desktop
|
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|
|
xscreensaver or xlock). When I remotely access my workstation desktop
|
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|
via x11vnc I can unlock the desktop fine, but I am worried people will
|
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|
via x11vnc I can unlock the desktop fine, but I am worried people will
|
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|
@ -2090,6 +2145,7 @@ exit 1 # reject it
|
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|
obviously re-lock the screen before disconnecting!). Instructions can
|
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|
|
obviously re-lock the screen before disconnecting!). Instructions can
|
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|
|
be found in the source code for the utility at the above link.
|
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|
be found in the source code for the utility at the above link.
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Q-37: Can I have x11vnc automatically lock the screen when I
|
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|
Q-37: Can I have x11vnc automatically lock the screen when I
|
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|
|
disconnect the VNC viewer?
|
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|
|
disconnect the VNC viewer?
|
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|
@ -2138,6 +2194,7 @@ x11vnc -logfile $HOME/.x11vnc.log -rfbauth $HOME/.vnc/passwd -forever -bg
|
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plus any other options you desire.
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plus any other options you desire.
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Q-39: How can I use x11vnc to connect to an X login screen like xdm,
|
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|
Q-39: How can I use x11vnc to connect to an X login screen like xdm,
|
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|
|
GNOME gdm, KDE kdm, or CDE dtlogin? (i.e. nobody is logged into an X
|
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|
|
GNOME gdm, KDE kdm, or CDE dtlogin? (i.e. nobody is logged into an X
|
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|
session yet).
|
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|
session yet).
|
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|
@ -2279,6 +2336,7 @@ rever -bg
|
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|
If the machine is a traditional Xterminal you may want to read
|
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|
|
If the machine is a traditional Xterminal you may want to read
|
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|
[253]this FAQ.
|
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|
[253]this FAQ.
|
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Q-40: Can I run x11vnc out of inetd(1)? How about xinetd(1)?
|
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|
Q-40: Can I run x11vnc out of inetd(1)? How about xinetd(1)?
|
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|
Yes, perhaps a line something like this in /etc/inetd.conf will do it
|
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|
Yes, perhaps a line something like this in /etc/inetd.conf will do it
|
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|
|
@ -2347,6 +2405,7 @@ service x11vncservice
|
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|
|
With the contents of /usr/local/bin/x11vnc_sh similar to the example
|
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|
|
With the contents of /usr/local/bin/x11vnc_sh similar to the example
|
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|
|
given above.
|
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|
given above.
|
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|
Q-41: How do I make x11vnc work with the Java VNC viewer applet in a
|
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|
|
Q-41: How do I make x11vnc work with the Java VNC viewer applet in a
|
|
|
|
web browser?
|
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|
|
web browser?
|
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|
|
@ -2374,6 +2433,7 @@ service x11vncservice
|
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|
|
entirely from the viewer-side by having the jar file there and using
|
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|
|
entirely from the viewer-side by having the jar file there and using
|
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|
|
either the java or appletviewer commands to run the program.
|
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|
|
either the java or appletviewer commands to run the program.
|
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Q-42: Are reverse connections (i.e. the VNC server connecting to the
|
|
|
|
Q-42: Are reverse connections (i.e. the VNC server connecting to the
|
|
|
|
VNC viewer) using "vncviewer -listen" and vncconnect(1) supported?
|
|
|
|
VNC viewer) using "vncviewer -listen" and vncconnect(1) supported?
|
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|
|
@ -2401,6 +2461,7 @@ service x11vncservice
|
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|
#
|
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|
|
#
|
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|
|
xprop -root -f VNC_CONNECT 8s -set VNC_CONNECT "$1"
|
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|
|
xprop -root -f VNC_CONNECT 8s -set VNC_CONNECT "$1"
|
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|
Q-43: Can I use x11vnc as a replacement for Xvnc? (i.e. not for a real
|
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|
|
Q-43: Can I use x11vnc as a replacement for Xvnc? (i.e. not for a real
|
|
|
|
display, but for a virtual one I keep around).
|
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|
|
display, but for a virtual one I keep around).
|
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|
@ -2443,6 +2504,7 @@ xmodmap -e "add Control = Control_L Control_R"
|
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|
|
One can use this sort of scheme to export other virtual X sessions,
|
|
|
|
One can use this sort of scheme to export other virtual X sessions,
|
|
|
|
say Xnest or even Xvnc itself (useful for testing x11vnc).
|
|
|
|
say Xnest or even Xvnc itself (useful for testing x11vnc).
|
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|
Q-44: How can I use x11vnc on "headless" machines? Why might I want
|
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|
|
Q-44: How can I use x11vnc on "headless" machines? Why might I want
|
|
|
|
to?
|
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|
to?
|
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@ -2539,6 +2601,7 @@ ied)
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done over local machine sockets it should be acceptable (see an
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done over local machine sockets it should be acceptable (see an
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[265]earlier question discussing -noshm).
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[265]earlier question discussing -noshm).
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Q-46: How can I make x11vnc use less system resources?
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Q-46: How can I make x11vnc use less system resources?
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The [266]-nap and "[267]-wait n" (where n is the sleep between polls
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The [266]-nap and "[267]-wait n" (where n is the sleep between polls
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@ -2548,6 +2611,7 @@ ied)
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[268]-onetile option will use less memory and use fewer shared memory
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[268]-onetile option will use less memory and use fewer shared memory
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slots (add [269]-fs 1.0 for one less slot).
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slots (add [269]-fs 1.0 for one less slot).
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Q-47: How can I make x11vnc use MORE system resources?
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Q-47: How can I make x11vnc use MORE system resources?
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You can try [270]-threads and dial down the wait time (e.g. -wait 1)
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You can try [270]-threads and dial down the wait time (e.g. -wait 1)
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@ -2561,6 +2625,7 @@ ied)
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the x11vnc [272]-id option) can be streamed over a LAN or wireless at
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the x11vnc [272]-id option) can be streamed over a LAN or wireless at
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a reasonable frame rate.
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a reasonable frame rate.
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Q-48: I use x11vnc over a slow link with high latency (e.g. dialup
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Q-48: I use x11vnc over a slow link with high latency (e.g. dialup
|
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modem), is there anything I can do to speed things up?
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modem), is there anything I can do to speed things up?
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@ -2622,6 +2687,7 @@ ied)
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* Use [282]-nocursor and [283]-nocursorpos (repainting the remote
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* Use [282]-nocursor and [283]-nocursorpos (repainting the remote
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cursor position and shape takes resources and round trips)
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cursor position and shape takes resources and round trips)
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Q-49: When I drag windows around with the mouse or scroll up and down
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Q-49: When I drag windows around with the mouse or scroll up and down
|
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things really bog down (unless I do the drag in a single, quick
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things really bog down (unless I do the drag in a single, quick
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motion). Is there anything to do to improve things?
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motion). Is there anything to do to improve things?
|
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@ -2648,6 +2714,7 @@ ied)
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(try to get the viewers to use different VNC encodings, e.g. tight and
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(try to get the viewers to use different VNC encodings, e.g. tight and
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ZRLE).
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ZRLE).
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Q-50: Does x11vnc support the X DAMAGE Xserver extension to find
|
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Q-50: Does x11vnc support the X DAMAGE Xserver extension to find
|
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|
modified regions of the screen quickly and efficiently?
|
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modified regions of the screen quickly and efficiently?
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@ -2733,6 +2800,7 @@ ied)
|
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apply a patch to your VNC Viewer to extract hidden alpha channel data
|
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|
apply a patch to your VNC Viewer to extract hidden alpha channel data
|
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under 32bpp. [296]Details can be found here.
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under 32bpp. [296]Details can be found here.
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Q-52: When using XFIXES cursorshape mode, some of the cursors look
|
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Q-52: When using XFIXES cursorshape mode, some of the cursors look
|
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really bad with extra black borders around the cursor and other cruft.
|
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really bad with extra black borders around the cursor and other cruft.
|
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How can I improve their appearance?
|
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How can I improve their appearance?
|
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@ -2780,6 +2848,7 @@ ied)
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-alpharemove to brighten them by having x11vnc divide out the alpha
|
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-alpharemove to brighten them by having x11vnc divide out the alpha
|
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value.
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value.
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Q-53: In XFIXES mode, are there any hacks to handle cursor
|
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Q-53: In XFIXES mode, are there any hacks to handle cursor
|
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|
transparency ("alpha channel") exactly?
|
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|
transparency ("alpha channel") exactly?
|
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@ -2830,6 +2899,7 @@ ied)
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CursorShapeUpdates) will be to draw the moving cursor into the x11vnc
|
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CursorShapeUpdates) will be to draw the moving cursor into the x11vnc
|
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|
framebuffer. This can also be disabled via -nocursor.
|
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framebuffer. This can also be disabled via -nocursor.
|
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Q-55: Can I take advantage of the TightVNC extension to the VNC
|
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|
Q-55: Can I take advantage of the TightVNC extension to the VNC
|
|
|
|
protocol where Cursor Positions Updates are sent back to all connected
|
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|
protocol where Cursor Positions Updates are sent back to all connected
|
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|
clients (i.e. passive viewers can see the mouse cursor being moved
|
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clients (i.e. passive viewers can see the mouse cursor being moved
|
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|
@ -2841,6 +2911,7 @@ ied)
|
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libvncserver CVS -cursorpos is the default. See also [305]-nocursorpos
|
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|
libvncserver CVS -cursorpos is the default. See also [305]-nocursorpos
|
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|
and [306]-nocursorshape.
|
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|
and [306]-nocursorshape.
|
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Q-56: Is it possible to swap the mouse buttons (e.g. left-handed
|
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|
Q-56: Is it possible to swap the mouse buttons (e.g. left-handed
|
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|
operation), or arbitrarily remap them? How about mapping button clicks
|
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|
|
operation), or arbitrarily remap them? How about mapping button clicks
|
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|
to keystrokes, e.g. to partially emulate Mouse wheel scrolling?
|
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|
to keystrokes, e.g. to partially emulate Mouse wheel scrolling?
|
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|
@ -2918,6 +2989,7 @@ ied)
|
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|
[313]-debug_keyboard option prints out much info for every keystroke
|
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|
[313]-debug_keyboard option prints out much info for every keystroke
|
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|
|
and so can be useful debugging things.
|
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|
and so can be useful debugging things.
|
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Q-58: When I try to type a "<" (i.e. less than) instead I get ">"
|
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|
Q-58: When I try to type a "<" (i.e. less than) instead I get ">"
|
|
|
|
(i.e. greater than)! Strangely, typing ">" works OK!!
|
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|
(i.e. greater than)! Strangely, typing ">" works OK!!
|
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|
@ -2978,6 +3050,7 @@ ied)
|
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|
Note that the [317]-debug_keyboard option prints out much info for
|
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|
|
Note that the [317]-debug_keyboard option prints out much info for
|
|
|
|
every keystroke to aid debugging keyboard problems.
|
|
|
|
every keystroke to aid debugging keyboard problems.
|
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Q-59: I'm using an "international" keyboard (e.g. German "de", or
|
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|
|
Q-59: I'm using an "international" keyboard (e.g. German "de", or
|
|
|
|
Danish "dk") and the -modtweak mode works well if the VNC viewer is
|
|
|
|
Danish "dk") and the -modtweak mode works well if the VNC viewer is
|
|
|
|
run on a Unix/Linux machine with a similar keyboard. But if I run
|
|
|
|
run on a Unix/Linux machine with a similar keyboard. But if I run
|
|
|
|
@ -3067,6 +3140,7 @@ ied)
|
|
|
|
when the Keysym is received from a VNC viewer, and only after that
|
|
|
|
when the Keysym is received from a VNC viewer, and only after that
|
|
|
|
would -add_keysyms, or anything else, come into play.
|
|
|
|
would -add_keysyms, or anything else, come into play.
|
|
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|
Q-60: When typing I sometimes get double, triple, or more of my
|
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|
|
Q-60: When typing I sometimes get double, triple, or more of my
|
|
|
|
keystrokes repeated. I'm sure I only typed them once, what can I do?
|
|
|
|
keystrokes repeated. I'm sure I only typed them once, what can I do?
|
|
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|
|
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|
@ -3103,6 +3177,7 @@ ied)
|
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|
autorepeating so there is no big loss here, unless someone is also
|
|
|
|
autorepeating so there is no big loss here, unless someone is also
|
|
|
|
working at the physical display and misses his autorepeating.
|
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|
|
working at the physical display and misses his autorepeating.
|
|
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|
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|
Q-61: The x11vnc -norepeat mode is in effect, but I still get repeated
|
|
|
|
Q-61: The x11vnc -norepeat mode is in effect, but I still get repeated
|
|
|
|
keystrokes!!
|
|
|
|
keystrokes!!
|
|
|
|
|
|
|
|
|
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|
|
@ -3126,6 +3201,7 @@ ied)
|
|
|
|
something in your desktop is automatically turning it back on you
|
|
|
|
something in your desktop is automatically turning it back on you
|
|
|
|
should figure out how to disable that somehow.
|
|
|
|
should figure out how to disable that somehow.
|
|
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|
Q-62: The machine where I run x11vnc has an AltGr key, but the local
|
|
|
|
Q-62: The machine where I run x11vnc has an AltGr key, but the local
|
|
|
|
machine where I run the VNC viewer does not. Is there a way I can map
|
|
|
|
machine where I run the VNC viewer does not. Is there a way I can map
|
|
|
|
a local unused key to send an AltGr? How about a Compose key as well?
|
|
|
|
a local unused key to send an AltGr? How about a Compose key as well?
|
|
|
|
@ -3140,6 +3216,7 @@ ied)
|
|
|
|
Super_R-Mode_switch,Menu-Multi_key" or use "-remap filename" to
|
|
|
|
Super_R-Mode_switch,Menu-Multi_key" or use "-remap filename" to
|
|
|
|
specify remappings from a file.
|
|
|
|
specify remappings from a file.
|
|
|
|
|
|
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|
Q-63: I have a Sun machine I run x11vnc on. Its Sun keyboard has just
|
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|
|
Q-63: I have a Sun machine I run x11vnc on. Its Sun keyboard has just
|
|
|
|
one Alt key labelled "Alt" and two Meta keys labelled with little
|
|
|
|
one Alt key labelled "Alt" and two Meta keys labelled with little
|
|
|
|
diamonds. The machine where I run the VNC viewer only has Alt keys.
|
|
|
|
diamonds. The machine where I run the VNC viewer only has Alt keys.
|
|
|
|
@ -3157,6 +3234,7 @@ ied)
|
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|
|
cannot send Alt_L in this case, maybe -remap Super_L-Meta_L would be a
|
|
|
|
cannot send Alt_L in this case, maybe -remap Super_L-Meta_L would be a
|
|
|
|
better choice if the Super_L key is typically unused.
|
|
|
|
better choice if the Super_L key is typically unused.
|
|
|
|
|
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|
|
|
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|
Q-64: Can I map a keystroke to a mouse button click on the remote
|
|
|
|
Q-64: Can I map a keystroke to a mouse button click on the remote
|
|
|
|
machine?
|
|
|
|
machine?
|
|
|
|
|
|
|
|
|
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|
|
@ -3202,6 +3280,7 @@ ied)
|
|
|
|
local display. Especially for hand-held devices. See also [332]this
|
|
|
|
local display. Especially for hand-held devices. See also [332]this
|
|
|
|
FAQ on x11vnc scaling.
|
|
|
|
FAQ on x11vnc scaling.
|
|
|
|
|
|
|
|
|
|
|
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|
|
Q-66: Does x11vnc support server-side framebuffer scaling? (E.g. to
|
|
|
|
Q-66: Does x11vnc support server-side framebuffer scaling? (E.g. to
|
|
|
|
make the desktop smaller).
|
|
|
|
make the desktop smaller).
|
|
|
|
|
|
|
|
|
|
|
|
@ -3262,6 +3341,7 @@ ied)
|
|
|
|
scaling to a different factor (e.g. use "-scale_cursor 1" to keep the
|
|
|
|
scaling to a different factor (e.g. use "-scale_cursor 1" to keep the
|
|
|
|
cursor at its natural unscaled size).
|
|
|
|
cursor at its natural unscaled size).
|
|
|
|
|
|
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|
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|
Q-67: Does x11vnc work with Xinerama? (i.e. multiple monitors joined
|
|
|
|
Q-67: Does x11vnc work with Xinerama? (i.e. multiple monitors joined
|
|
|
|
together to form one big, single screen).
|
|
|
|
together to form one big, single screen).
|
|
|
|
|
|
|
|
|
|
|
|
@ -3289,6 +3369,7 @@ ied)
|
|
|
|
function. (This may be due to a bug in the X server for XTEST when
|
|
|
|
function. (This may be due to a bug in the X server for XTEST when
|
|
|
|
Xinerama is enabled).
|
|
|
|
Xinerama is enabled).
|
|
|
|
|
|
|
|
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|
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|
|
Q-68: Can I use x11vnc on a multi-headed display that is not Xinerama
|
|
|
|
Q-68: Can I use x11vnc on a multi-headed display that is not Xinerama
|
|
|
|
(i.e. separate screens :0.0, :0.1, ... for each monitor)?
|
|
|
|
(i.e. separate screens :0.0, :0.1, ... for each monitor)?
|
|
|
|
|
|
|
|
|
|
|
|
@ -3312,6 +3393,7 @@ ied)
|
|
|
|
this case (to limit each x11vnc to 3 shm segments), or even
|
|
|
|
this case (to limit each x11vnc to 3 shm segments), or even
|
|
|
|
[342]-noshm to use no shm segments.
|
|
|
|
[342]-noshm to use no shm segments.
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
|
|
Q-69: Can x11vnc show only a portion of the display? (E.g. for a
|
|
|
|
Q-69: Can x11vnc show only a portion of the display? (E.g. for a
|
|
|
|
special purpose rfb application).
|
|
|
|
special purpose rfb application).
|
|
|
|
|
|
|
|
|
|
|
|
@ -3324,6 +3406,7 @@ ied)
|
|
|
|
the [344]-id or [345]-sid options are used. The offset is measured
|
|
|
|
the [344]-id or [345]-sid options are used. The offset is measured
|
|
|
|
from the upper left corner of the selected window.
|
|
|
|
from the upper left corner of the selected window.
|
|
|
|
|
|
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|
|
|
|
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|
|
|
Q-70: Does x11vnc support the XRANDR (X Resize, Rotate and Reflection)
|
|
|
|
Q-70: Does x11vnc support the XRANDR (X Resize, Rotate and Reflection)
|
|
|
|
extension? Whenever I rotate or resize the screen x11vnc just seems to
|
|
|
|
extension? Whenever I rotate or resize the screen x11vnc just seems to
|
|
|
|
crash.
|
|
|
|
crash.
|
|
|
|
@ -3346,11 +3429,13 @@ ied)
|
|
|
|
specify "-xrandr exit" then all will be disconnected and x11vnc will
|
|
|
|
specify "-xrandr exit" then all will be disconnected and x11vnc will
|
|
|
|
terminate.
|
|
|
|
terminate.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Q-71: Why is the view in my VNC viewer completely black? Or why is
|
|
|
|
Q-71: Why is the view in my VNC viewer completely black? Or why is
|
|
|
|
everything flashing around randomly?
|
|
|
|
everything flashing around randomly?
|
|
|
|
|
|
|
|
|
|
|
|
See the next FAQ for a possible explanation.
|
|
|
|
See the next FAQ for a possible explanation.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Q-72: I use Linux Virtual Consoles (VC's) to implement 'Fast User
|
|
|
|
Q-72: I use Linux Virtual Consoles (VC's) to implement 'Fast User
|
|
|
|
Switching' between users' sessions (e.g. Betty is on Ctrl-Alt-F7,
|
|
|
|
Switching' between users' sessions (e.g. Betty is on Ctrl-Alt-F7,
|
|
|
|
Bobby is on Ctrl-Alt-F8, and Sid is on Ctrl-Alt-F1: they use those
|
|
|
|
Bobby is on Ctrl-Alt-F8, and Sid is on Ctrl-Alt-F1: they use those
|
|
|
|
@ -3378,6 +3463,7 @@ ied)
|
|
|
|
x11vnc can poll it correctly), one can use the chvt(1) command, e.g.
|
|
|
|
x11vnc can poll it correctly), one can use the chvt(1) command, e.g.
|
|
|
|
"chvt 7" for VC #7.
|
|
|
|
"chvt 7" for VC #7.
|
|
|
|
|
|
|
|
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|
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Q-73: Can I use x11vnc to view my VMWare session remotely?
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Q-73: Can I use x11vnc to view my VMWare session remotely?
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Yes, since VMWare is an X application you can view it via x11vnc in
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Yes, since VMWare is an X application you can view it via x11vnc in
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@ -3421,6 +3507,7 @@ ied)
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to have a video card, (but need not have a monitor, Keyboard or
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to have a video card, (but need not have a monitor, Keyboard or
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mouse)).
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mouse)).
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Q-74: I am using x11vnc where my local machine has "popup/hidden
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Q-74: I am using x11vnc where my local machine has "popup/hidden
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taskbars" (e.g. GNOME or MacOS X) and the remote display where x11vnc
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taskbars" (e.g. GNOME or MacOS X) and the remote display where x11vnc
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runs also has "popup/hidden taskbars" (e.g. GNOME). When I move the
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runs also has "popup/hidden taskbars" (e.g. GNOME). When I move the
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@ -3449,6 +3536,7 @@ ied)
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"Klipper" that do odd things with the selection, clipboard, and
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"Klipper" that do odd things with the selection, clipboard, and
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cutbuffers.
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cutbuffers.
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Q-76: Why don't I hear the "Beeps" in my X session (e.g. when typing
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Q-76: Why don't I hear the "Beeps" in my X session (e.g. when typing
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tput bel in an xterm)?
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tput bel in an xterm)?
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runge
20 years ago