diff --git a/docs/man/sesman.ini.5 b/docs/man/sesman.ini.5
index 2bf69297..6a0d5459 100644
--- a/docs/man/sesman.ini.5
+++ b/docs/man/sesman.ini.5
@@ -98,9 +98,8 @@ If unset or set to \fI0\fR, unlimited session are allowed.
 
 .TP 
 \fBKillDisconnected\fR=\fI[0|1]\fR
-If set to \fB1\fR, \fBtrue\fR or \fByes\fR, every session will be killed when the user disconnects.
+If set to \fB1\fR, \fBtrue\fR or \fByes\fR, every session will be killed within 60 seconds when the user disconnects.
 .br 
-\fI\-this option is currently ignored!\-\fR
 
 .TP 
 \fBIdleTimeLimit\fR=\fI<number>\fR
@@ -112,11 +111,10 @@ If set to \fI0\fR, automatic disconnection is disabled.
 
 .TP 
 \fBDisconnectedTimeLimit\fR=\fI<number>\fR
-Sets the the time limit before a disconnected session is killed.
+Sets the the time(in seconds) limit before a disconnected session is killed.
 .br 
 If set to \fI0\fR, automatic killing is disabled.
 .br 
-\fI\-this option is currently ignored!\-\fR
 
 .SH "SECURITY"
 The following parameters can be used in the \fB[Sessions]\fR section:
diff --git a/sesman/sesman.ini b/sesman/sesman.ini
index 571e063b..02fef5ba 100644
--- a/sesman/sesman.ini
+++ b/sesman/sesman.ini
@@ -17,8 +17,13 @@ AlwaysGroupCheck = false
 [Sessions]
 X11DisplayOffset=10
 MaxSessions=10
+# if 1, true, or yes, kill session after 60 seconds
 KillDisconnected=0
+# if not zero, the seconds without mouse or keyboard input before disconnect
+# not complete yet
 IdleTimeLimit=0
+# if not zero, the seconds before a disconnected session is killed
+# min 60 seconds
 DisconnectedTimeLimit=0
 
 [Logging]
diff --git a/xorg/X11R7.6/rdp/rdpup.c b/xorg/X11R7.6/rdp/rdpup.c
index 325ee492..b8a763a7 100644
--- a/xorg/X11R7.6/rdp/rdpup.c
+++ b/xorg/X11R7.6/rdp/rdpup.c
@@ -137,14 +137,14 @@ static int g_rdp_opcodes[16] =
 static int g_do_kill_disconnected = 0; /* turn on or off */
 static OsTimerPtr g_dis_timer = 0;
 static int g_disconnect_scheduled = 0;
-static CARD32 g_disconnect_timeout = 60 * 1000; /* 60 seconds */
-static CARD32 g_disconnect_time = 0; /* time of disconnect */
+static CARD32 g_disconnect_timeout_s = 60; /* 60 seconds */
+static CARD32 g_disconnect_time_ms = 0; /* time of disconnect in milliseconds */
 
 /******************************************************************************/
 static CARD32
 rdpDeferredDisconnectCallback(OsTimerPtr timer, CARD32 now, pointer arg)
 {
-    CARD32 lnow;
+    CARD32 lnow_ms;
 
     LLOGLN(10, ("rdpDeferredDisconnectCallback"));
     if (g_connected)
@@ -165,8 +165,8 @@ rdpDeferredDisconnectCallback(OsTimerPtr timer, CARD32 now, pointer arg)
     {
         LLOGLN(10, ("rdpDeferredDisconnectCallback: not connected"));
     }
-    lnow = GetTimeInMillis();
-    if (lnow - g_disconnect_time > g_disconnect_timeout)
+    lnow_ms = GetTimeInMillis();
+    if (lnow_ms - g_disconnect_time_ms > g_disconnect_timeout_s * 1000)
     {
         LLOGLN(0, ("rdpDeferredDisconnectCallback: exit X11rdp"));
         kill(getpid(), SIGTERM);
@@ -192,7 +192,7 @@ rdpup_disconnect(void)
                                    rdpDeferredDisconnectCallback, 0);
             g_disconnect_scheduled = 1;
         }
-        g_disconnect_time = GetTimeInMillis();
+        g_disconnect_time_ms = GetTimeInMillis();
     }
 
     RemoveEnabledDevice(g_sck);
@@ -1063,20 +1063,31 @@ rdpup_init(void)
     ptext = getenv("XRDP_SESMAN_MAX_DISC_TIME");
     if (ptext != 0)
     {
-        g_disconnect_timeout = atoi(ptext);
+        i = atoi(ptext);
+        if (i > 0)
+        {
+            g_do_kill_disconnected = 1;
+            g_disconnect_timeout_s = atoi(ptext);
+        }
     }
     ptext = getenv("XRDP_SESMAN_KILL_DISCONNECTED");
     if (ptext != 0)
     {
-        g_do_kill_disconnected = atoi(ptext);
+        i = atoi(ptext);
+        if (i != 0)
+        {
+            g_do_kill_disconnected = 1;
+            g_disconnect_timeout_s = 0;
+        }
     }
 
-    if (g_disconnect_timeout == 0)
+    if (g_do_kill_disconnected && (g_disconnect_timeout_s < 60))
     {
-        g_do_kill_disconnected = 0;
+        g_disconnect_timeout_s = 60;
     }
-    rdpLog("kill disconencted [%d] timeout [%d]\n", g_do_kill_disconnected,
-           g_disconnect_timeout);
+
+    rdpLog("kill disconencted [%d] timeout [%d] sec\n", g_do_kill_disconnected,
+           g_disconnect_timeout_s);
 
     return 1;
 }