https://bugs.kde.org/show_bug.cgi?id=491817
Bug ID: 491817
Summary: Monitors with VRR setting to Auto goes black after
turn off & on monitor
Classification: Plasma
Product: kwin
Version: 6.1.4
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
Monitors with VRR setting to Auto/Always goes black after turn off & on monitor
System:
Display 1: ASUS PA278QV (75Hz max)
Display 2: LG 24GM79G (144Hz max)
Tested in two AMD CPU, Nvidia GPU systems, both are running Nvidia 555.58 dkms
driver from main repo. IIRC the bug was present since plasma 6.0, and only can
reproduce in wayland session.
1. AMD 7950x, Nvidia 4090
2. AMD 3600, Nvidia 2060 super
STEPS TO REPRODUCE
1. Turn off monitor while system is not suspended
2. Turn on monitor
3. Enter fullscreen while VRR setting is set to Auto (if VRR setting is always,
then the monitor will not display anything)
OBSERVED RESULT
Depends on the monitor, the result is slightly different. The ASUS monitor will
not display anything (receive no signal and enter sleep), whereas the LG
monitor will not display anything until the fullscreen video starts to play,
then it will resume display.
EXPECTED RESULT
Monitor displays image
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 6.10.5
KDE Plasma Version: 6.1.4
KDE Frameworks Version: 6.5.0
Qt Version: 6.7.2
ADDITIONAL INFORMATION
The above issue could be somewhat fixed by turning off VRR, as stated by other
user:
https://www.reddit.com/r/kde/comments/1dpcw7g/full_screen_makes_the_screen_black/
Changing to another tty and go back to the original tty will also fix the
problem, until the above STEPS TO REPRODUCE is attempted again.
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