https://bugs.kde.org/show_bug.cgi?id=488670
Bug ID: 488670
Summary: Freeze with black screen when trying to enter the
Wayland session
Classification: Plasma
Product: kwin
Version: git-stable-Plasma/6.1
Platform: Neon
OS: Linux
Status: REPORTED
Severity: grave
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: kont...@soee.pl
Target Milestone: ---
SUMMARY
Some scenario leads to a situation when trying to login to Wayland session the
PC just freezes after SDDM with black screen and white _ in the upper left
corner of the screen.
STEPS TO REPRODUCE
I am not sure how to reproduce it. I am sure it has something to do with
playing with the Display Settings where we can set the refresh rate, adaptive
synchronization, color profile etc.
I had this situation twice already. I was playing with the display setting to
test poor performance on the Nvidia GPU.
I was changing the refresh rate, adaptive synchronization, once set build in
color profile.
There were no crashes when playing with tho settings, just PC freeze after
reboot and login with SDDM.
There is one workaround/manual fix which allows me to restore my desktop and
use Wayland session:
- enter recovery mode or CLI when not in any active session
- remove file: ~/.config/kwinoutputconfig.json
After that i can login just fine. I have notification that i am running in the
graphics safe mode (nomodeset) but after next reboot/login its gone any my
desktop works fine.
Looking at logs i'v seen such entries for example:
cze 17 19:48:32 TachikomaPC-Neon kwin_wayland[1821]: kwin_scene_opengl: 0x502:
GL_INVALID_OPERATION error generated. and are incompatible
cze 17 19:48:32 TachikomaPC-Neon kwin_wayland[1821]: kwin_scene_opengl: Invalid
framebuffer status: "GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT"
cze 17 19:48:32 TachikomaPC-Neon kwin_wayland[1821]: kwin_wayland_drm: Checking
test buffer failed!
cze 17 19:48:32 TachikomaPC-Neon kwin_wayland[1821]: kwin_core: Applying output
config failed!
OBSERVED RESULT
The PC sometimes freezes when trying to enter Wayland session.
EXPECTED RESULT
Wayland session should work fine without any PC freezes.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Neon
KDE Plasma Version: 6.1
KDE Frameworks Version: 6.3.0
Qt Version: 6.7.0
GPU: Nvidia 4080
GPU Driver Version: 555.52.04
ADDITIONAL INFORMATION
I am not sure what causes this problem and i am not 100% sure if it is some
bug, but i am posting it here as maybe someone can confirm it.
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