Blank screen or flashing screen when resuming from sleep or hibernate
SUMMARY
Blank screen when resuming from sleep or hibernate or when TV has been off for a while
Originally raised with KDE: https://bugs.kde.org/show_bug.cgi?id=465403. KDE developers think it is a kernel defect and asked to raise it upstream. Kernel.org suggests to raise kernel defects at the correct distribution.
After that I raised it with arch kernel. https://bugs.archlinux.org/task/77418
Now I raise it here.
STEPS TO REPRODUCE
- Boot
- Login
- Sleep or Hibernate
- Wait for TV to go a sleep or switch off (Samsung Neo QLED QN90B 43")
- Resume
- You reached the failure state
OBSERVED RESULT
The screen is white or flickering between white and rendering the lock screen.
Login works. Typing in kwin_x11 --replace sometimes works and then the system can be used again.
Most of the times the system does not recover and a reboot is required.
I used KDE Connect to unlock and execute kwin_x11 --replace also. This sometimes also works as a work arround.
EXPECTED RESULT
Rendering the lock screen normally and resume the system in a usable state.
**SOFTWARE/OS VERSIONS **
Linux/KDE Plasma: 6.1.9-arch1-2 (64-bit)
KDE Plasma Version: 5.26.5
KDE Frameworks Version: 5.102.0
Qt Version: 5.15.8
Also occurs on 6.1.15-1-lts now.