Package: x11vnc Version: 0.9.16-8+b1I am using VNC via SSH using x11vnc to access my remote desktop from home. x11vnc is called with the following arguments:
x11vnc -quiet -safer -localhost -nopw -once -display :0
Since upgrading to Debian Bookworm about half a year ago, update performance degraded rapidly and the following messages started showing up in the output from x11vnc on various events (opening of windows, focus changes):
PORT=5900 The VNC desktop is: localhost:0 *** fb_push ublen NOT ZERO: -1616838418 *** fb_push ublen NOT ZERO: 932745215 *** fb_push ublen NOT ZERO: -1644826 *** fb_push ublen NOT ZERO: -1711237889 *** fb_push ublen NOT ZERO: -1711237889
The same issue has been reported by at least one other user as well in the Debian forums [1].
After erroneously assuming this to be caused by a patch that was backported to Bullseye (see [2] and [3]), it appears now to be a packaging bug as recompiling x11vnc locally fixes the issue.
References: [1] https://forums.debian.net/viewtopic.php?t=153655 [2] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1027043 [3] https://github.com/LibVNC/x11vnc/issues/220
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