https://bugs.kde.org/show_bug.cgi?id=520124
Bug ID: 520124
Summary: Screen flicker on 2nd monitor after wake from sleep
Classification: Plasma
Product: kwin
Version First unspecified
Reported In:
Platform: CachyOS
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: platform-drm
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Target Milestone: ---
DESCRIPTION: After waking from sleep, my second monitor has a sporadic flicker
to black under input activity.
STEPS TO REPRODUCE
1. Leave the system idle long enough for monitors to fully power down via DPMS
(in this case screen off set to 10 minutes, system suspend at 15 minutes)
2. Wake the system from sleep
3. Move mouse, click, or type on either monitor
OBSERVED RESULT
Occasional flicker to black on the 2nd monitor
EXPECTED RESULT
No flickering
SOFTWARE/OS VERSIONS
Operating System (available in the Info Center app, or by running `kinfo` in a
terminal window): CachyOS Linux
KDE Plasma Version: 6.6.4
KDE Frameworks Version: 6.26.0
Qt Version: 6.11.0
ADDITIONAL INFORMATION
Workaround: Simply changing any display setting for either monitor will fix the
isssue. I've set up a shell script to just disable and enable HDR to fix it
quickly.
GPU: NVIDIA RTX 5090 (GB202) with driver 595.58.03, alongside AMD Radeon
integrated graphics (Granite Ridge)
Monitors: 3440x1440 @ 164Hz (primary, DP-1) and 2560x1440 @ 144Hz (secondary,
DP-3)
Issue only occurs after a full DPMS power-down cycle, not on immediate wake
I had another CachyOs install for testing on my other drive before installing
it onto this current drive with the same configuration, and I did not
experience this issue there.
The same monitor also has an issue around brightness, it sometimes will wake
from sleep and just be a little darker
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