meven
2
Do have debuginfod active ? Try turning it on and get the stack trace again, it should be more informative.
/usr/lib/xorg/modules/extensions/libvnc.so
That’s not in KDE software, neither is Xorg.
Are you using vnc, remote screen ?
It looks like:
You might want to consider the workaround: Random Log Outs in X11 - #19 by meven