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@ -2,7 +2,7 @@
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Copyright (C) 2002-2009 Karl J. Runge <runge@karlrunge.com>
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All rights reserved.
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x11vnc README file Date: Sun Mar 15 18:06:19 EDT 2009
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x11vnc README file Date: Tue Mar 31 23:24:00 EDT 2009
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The following information is taken from these URLs:
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@ -586,12 +586,12 @@ vncviewer -via $host localhost:0 # must be TightVNC vncviewer.
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SourceForge.net. I use libvncserver for all of the VNC aspects; I
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couldn't have done without it. The full source code may be found and
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downloaded (either file-release tarball or CVS tree) from the above
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link. As of Dec 2008, the [91]x11vnc-0.9.6.tar.gz source package is
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released (recommended download). The [92]x11vnc 0.9.6 release notes.
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link. As of Mar 2009, the [91]x11vnc-0.9.7.tar.gz source package is
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released (recommended download). The [92]x11vnc 0.9.7 release notes.
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The x11vnc package is the subset of the libvncserver package needed to
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build the x11vnc program. Also, you can get a copy of my latest,
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bleeding edge [93]x11vnc-0.9.7.tar.gz tarball to build the most up to
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bleeding edge [93]x11vnc-0.9.8.tar.gz tarball to build the most up to
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date one.
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Precompiled Binaries/Packages: See the [94]FAQ below for information
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@ -629,13 +629,13 @@ vncviewer -via $host localhost:0 # must be TightVNC vncviewer.
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them by default.)
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If your OS has libjpeg.so and libz.so in standard locations you can
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build as follows (example given for the 0.9.6 release of x11vnc:
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build as follows (example given for the 0.9.7 release of x11vnc:
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replace with the version you downloaded):
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(un-tar the x11vnc+libvncserver tarball)
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# gzip -dc x11vnc-0.9.6.tar.gz | tar -xvf -
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# gzip -dc x11vnc-0.9.7.tar.gz | tar -xvf -
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(cd to the source directory)
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# cd x11vnc-0.9.6
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# cd x11vnc-0.9.7
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(run configure and then run make)
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# ./configure
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@ -877,13 +877,13 @@ make
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I'd appreciate any additional testing very much.
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Thanks to those who suggested features and helped beta test x11vnc
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0.9.6 released in Dec 2008!
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0.9.7 released in Mar 2009!
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Please help test and debug the 0.9.7 version for release sometime in
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Spring 2009.
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Please help test and debug the 0.9.8 version for release sometime in
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Summer 2009.
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The version 0.9.7 beta tarball is kept here:
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[114]x11vnc-0.9.7.tar.gz
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The version 0.9.8 beta tarball is kept here:
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[114]x11vnc-0.9.8.tar.gz
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There are also some Linux, Solaris, Mac OS X, and other OS test
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binaries [115]here. Please kick the tires and report bugs, performance
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@ -900,7 +900,11 @@ make
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Encryption Plugin' settings panel.)
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Here are some features that will appear in the 0.9.7 release:
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Here are some features that will appear in the 0.9.8 release:
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* Coming Soon!
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Here are some features that appeared in the 0.9.7 release:
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* Support for polling Linux Virtual Terminals (also called virtual
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consoles) directly instead of using /dev/fb. The option to use is,
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for example, "-rawfb vt2" for Virtual Terminal 2, etc. In this
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@ -1350,34 +1354,44 @@ LAY
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activity changes most of the screen (e.g. moving or iconifying a
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large window) there is a delay of 0.5-1 sec while x11vnc reads the
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changed regions in.
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A slow framebuffer read rate will often be the performance
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bottleneck on a fast LAN (whereas on slower links the reduced
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network bandwidth becomes the bottleneck.)
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Note: A quick way to get a 2X speedup of this for x11vnc is to
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switch from depth 24 (32bpp) to depth 16 (16bpp). You get a 4X
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speedup going to 8bpp, but the lack of color cells is usually
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unacceptable.
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switch your X server from depth 24 (32bpp) to depth 16 (16bpp).
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You get a 4X speedup going to 8bpp, but the lack of color cells is
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usually unacceptable.
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To get a sense of the read and write speeds of your video card,
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you can run benchmarks like: x11perf -getimage500, x11perf
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-putimage500, x11perf -shmput500 and for XFree86 displays with
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direct graphics access the dga command (press "b" to run the
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you can run benchmarks like: "x11perf -getimage500", "x11perf
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-putimage500", "x11perf -shmput500" and for XFree86 displays with
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direct graphics access the "dga" command (press "b" to run the
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benchmark and then after a few seconds press "q" to quit). Even
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this "dd if=/dev/fb0 of=/dev/null" often gives a good estimate. We
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have seen a few cases where the hardware fb read speed is greater
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than 65 MB/sec: on high end graphics workstations from SGI and
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Sun, and also from a Linux user using nvidia proprietary drivers
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for his nvidia video card. Update 2008: thankfully, these sped up
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drivers are becoming more common on Linux and *BSD systems and
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that makes x11vnc run somewhat more quickly.
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this "dd if=/dev/fb0 of=/dev/null" often gives a good estimate.
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x11vnc also prints out its estimate:
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28/02/2009 11:11:07 Autoprobing TCP port
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28/02/2009 11:11:07 Autoprobing selected port 5900
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28/02/2009 11:11:08 fb read rate: 10 MB/sec
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28/02/2009 11:11:08 screen setup finished.
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We have seen a few cases where the hardware fb read speed is
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greater than 65 MB/sec: on high end graphics workstations from SGI
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and Sun, and also from a Linux user using nvidia proprietary
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drivers for his nvidia video card. Update 2008: thankfully, these
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sped up drivers are becoming more common on Linux and *BSD systems
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and that makes x11vnc run somewhat more quickly. Sometimes they
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have a read rate of over 400 MB/sec.
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On XFree86/Xorg it is actually possible to increase the
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framebuffer read speed considerably (10-100 times) by using the
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Shadow Framebuffer (a copy of the framebuffer is kept in main
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memory and this can be read much more quickly). To do this one
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puts the line Option "ShadowFB" "true" in the Device section of
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the /etc/X11/XF86Config or /etc/X11/xorg.conf file. Note that this
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disables 2D acceleration at the physical display and so likely
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defeats the purpose. Nevertheless this could be handy in some
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circumstances, e.g. if the slower speed while sitting at the
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physical display was acceptable (this seems to be true for most
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video cards these days). Unfortunately it does not seem shadowfb
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can be turned on and off dynamically...
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disables 2D acceleration at the physical display and so that might
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be unacceptable if one plays games, etc. on the machine's local
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display. Nevertheless this could be handy in some circumstances,
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e.g. if the slower speed while sitting at the physical display was
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acceptable (this seems to be true for most video cards these
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days). Unfortunately it does not seem shadowfb can be turned on
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and off dynamically...
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Another amusing thing one can do is use Xvfb as the X server, e.g.
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"xinit $HOME/.xinitrc -- /usr/X11R6/bin/Xvfb :1 -screen 0
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1024x768x16" x11vnc can poll Xvfb efficiently via main memory.
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@ -1512,9 +1526,9 @@ References
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88. http://www.karlrunge.com/x11vnc/faq.html#faq-ssl-tunnel-int
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89. http://www.karlrunge.com/x11vnc/ssvnc.html
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90. http://sourceforge.net/projects/libvncserver/
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91. http://sourceforge.net/project/showfiles.php?group_id=32584&package_id=119006&release_id=646288
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92. http://sourceforge.net/project/shownotes.php?release_id=646288&group_id=32584
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93. http://x11vnc.sourceforge.net/dev/x11vnc-0.9.7.tar.gz
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91. http://sourceforge.net/project/showfiles.php?group_id=32584&package_id=119006&release_id=672184
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92. http://sourceforge.net/project/shownotes.php?release_id=672184&group_id=32584
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93. http://x11vnc.sourceforge.net/dev/x11vnc-0.9.8.tar.gz
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94. http://www.karlrunge.com/x11vnc/faq.html#faq-binaries
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95. http://www.tightvnc.com/download.html
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96. http://www.realvnc.com/products/free/4.1/download.html
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@ -1535,7 +1549,7 @@ References
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111. http://www.karlrunge.com/x11vnc/faq.html#faq-solaris251build
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112. http://www.karlrunge.com/x11vnc/faq.html#faq-macosx
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113. http://www.karlrunge.com/x11vnc/faq.html#faq-ssl-tunnel-int
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114. http://x11vnc.sourceforge.net/dev/x11vnc-0.9.7.tar.gz
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114. http://x11vnc.sourceforge.net/dev/x11vnc-0.9.8.tar.gz
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115. http://www.karlrunge.com/x11vnc/bins
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116. mailto:xvml@karlrunge.com
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117. http://www.karlrunge.com/x11vnc/faq.html#faq-ssl-tunnel-int
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@ -6344,15 +6358,15 @@ EndSection
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6200) x11vnc and [549]SSVNC, both TurboVNC enabled, were able to
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sustain 13.5 frames/sec (fps) and 15 Megapixels/sec using the
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VirtualGL supplied OpenGL benchmark program glxspheres. VirtualGL on
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higher-end hardware can sustain [550]23-30 fps with the glxspheres
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higher-end hardware can sustain [550]20-30 fps with the glxspheres
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benchmark.
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Potential Slowdown: As we describe [551]elsewhere, unless you use
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x11vnc with an X server using, say, NVidia proprietary drivers (or a
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virtual X server like Xvfb or Xdummy, or in ShadowFB mode), then the
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read rate from the graphics card can rather slow (e.g. 10 MB/sec) and
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becomes the bottleneck when using x11vnc over fast networks. Note that
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all of Xorg's drivers currently (2009) have slow read rates (only
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read rate from the graphics card can be rather slow (e.g. 10 MB/sec)
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and becomes the bottleneck when using x11vnc over fast networks. Note
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that all of Xorg's drivers currently (2009) have slow read rates (only
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proprietary drivers appear to have optimized reads.)
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So under these (more or less typical) conditions, the speed
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@ -9678,7 +9692,7 @@ ev
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contain very large "case statements" (over 100 cases) that on some
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platforms can take a very long time to compile (in extreme cases over
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an hour). However on 32bit Linux with intel/amd processor and gcc
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these files usually take less then 10 seconds to compile. For 64bit
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these files usually take less than 10 seconds to compile. For 64bit
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systems using gcc the problem appears to be much worse.
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The two files with the large number of cases, remote.c and x11vnc.c,
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@ -12500,7 +12514,7 @@ x11vnc: a VNC server for real X displays
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Here are all of x11vnc command line options:
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% x11vnc -opts (see below for -help long descriptions)
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x11vnc: allow VNC connections to real X11 displays. 0.9.7 lastmod: 2009-03-15
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x11vnc: allow VNC connections to real X11 displays. 0.9.8 lastmod: 2009-03-30
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x11vnc options:
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-display disp -auth file -N
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@ -12625,7 +12639,7 @@ libvncserver-tight-extension options:
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% x11vnc -help
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x11vnc: allow VNC connections to real X11 displays. 0.9.7 lastmod: 2009-03-15
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x11vnc: allow VNC connections to real X11 displays. 0.9.8 lastmod: 2009-03-30
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(type "x11vnc -opts" to just list the options.)
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runge
15 years ago