This problem bugs me every now and then, and as it is a real showstopper, I would appreciate help to sort this out.
I am running Krita 5.0.2 on Ubuntu 20.04.4 LTS with a Wacom Cintiq 12WX, when my stylus seems to be no longer working. Switching my cintiq off and on doesn't fix the problem, and after a while my xserver windows manager crashes. This is really inconvenient, as this kills all of my gui programs. The log shows:

Code: Select all

Apr 15 20:41:32 behemoth /usr/lib/gdm3/gdm-x-session[2830]: (EE) Backtrace:
Apr 15 20:41:32 behemoth /usr/lib/gdm3/gdm-x-session[2830]: (EE) 0: /usr/lib/xorg/Xorg (OsLookupColor+0x13c) [0x562a72e93aec]
Apr 15 20:41:32 behemoth /usr/lib/gdm3/gdm-x-session[2830]: (EE) 1: /lib/x86_64-linux-gnu/libpthread.so.0 (funlockfile+0x60) [0x7fe31df853c0]
Apr 15 20:41:32 behemoth /usr/lib/gdm3/gdm-x-session[2830]: (EE) 2: ? (?+0x0) [0x562a73ca0010]
Apr 15 20:41:32 behemoth /usr/lib/gdm3/gdm-x-session[2830]: (EE)
Apr 15 20:41:32 behemoth /usr/lib/gdm3/gdm-x-session[2830]: (EE) Segmentation fault at address 0x562a73ca0010
Apr 15 20:41:32 behemoth /usr/lib/gdm3/gdm-x-session[2830]: (EE)
Apr 15 20:41:32 behemoth /usr/lib/gdm3/gdm-x-session[2830]: Fatal server error:
Apr 15 20:41:32 behemoth /usr/lib/gdm3/gdm-x-session[2830]: (EE) Caught signal 11 (Segmentation fault). Server aborting
Apr 15 20:41:32 behemoth /usr/lib/gdm3/gdm-x-session[2830]: (EE)
Apr 15 20:41:32 behemoth /usr/lib/gdm3/gdm-x-session[2830]: (EE)
Apr 15 20:41:32 behemoth /usr/lib/gdm3/gdm-x-session[2830]: Please consult the The X.Org Foundation support
Apr 15 20:41:32 behemoth /usr/lib/gdm3/gdm-x-session[2830]: #011 at http://wiki.x.org
Apr 15 20:41:32 behemoth /usr/lib/gdm3/gdm-x-session[2830]:  for help.
Apr 15 20:41:32 behemoth /usr/lib/gdm3/gdm-x-session[2830]: (EE) Please also check the log file at "/home/eezacque/.local/share/xorg/Xorg.0.log" for additional information


Neither http://wiki.x.org nor /home/eezacque/.local/share/xorg/Xorg.0.log seems to provide any useful information.

Any suggestion on how to proceed is appreciated!