Created attachment 144429 [details]
Journal boot logs until KWin crash

SUMMARY
***
NOTE: If you are reporting a crash, please try to attach a backtrace with debug symbols.
See https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports
***
Sometimes at boot kwin_x11 throws "Freeze in OpenGL initialization detected"
and disables compositing (with OpenGL x.y compositing enabled in
systemsettings). This happens apparently in a random fashion. I am using the
default user configuration files in /home. I put the journalctl log in the
attachment. This error never happened to me before, but I can't recall which
change triggered the error. I recently updated Plasma, though. Clicking
"Re-enable OpenGL compositing" in systemsettings and relaunching kwin
effectively re-enables compositing.


STEPS TO REPRODUCE
1. Enable OpenGL (whatever version) compositing under System Settings > Composer
2. Restart
3. Launch a Plasma X11 session in sddm

OBSERVED RESULT

No compositing, sometimes kwin_x11 doesn't even start remaining a blank screen.

EXPECTED RESULT
Compositing working

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 5.23.4
KDE Frameworks Version: 5.88.0
Qt Version: 5.15.2
Kernel Version: 5.10.76 (64-bit)
Graphics Platform: X11

ADDITIONAL INFORMATION

Processors: Intel Core i7-6850k
Memory: 128GB
Graphics Processor: Nvidia GeForce GTX1060 6GB
Nvidia Drivers: 495.44