Bug 500991

Summary: Right bottom half of the screen flickers
Product: [Plasma] kwin Reporter: fabiand
Component: generalAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED UPSTREAM    
Severity: normal CC: kdedev
Priority: NOR    
Version First Reported In: 6.3.2   
Target Milestone: ---   
Platform: Manjaro   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: Flicker
Screen Settings
System Info
Flicker Webm

Description fabiand 2025-03-03 08:28:55 UTC
Created attachment 179056 [details]
Flicker

SUMMARY
The lower right area of the screen (Odyssey G9 Neo 32:9) sometimes flickers (the background image clips through). The left half of the screen is never affected. It makes no difference which program is used. It is particularly reproducible when a Firefox Twitch stream is running in PIP mode in the right half of the screen and the Firefox window is clicked once on the left half of the screen to bring it to the foreground. However, the taskbar or other applications also flicker, but always only in the lower right half of the screen.

STEPS TO REPRODUCE
1. Open any Twitch Stream in Firefox Wayland mode.
2. Click Picture-in-Picture and put the PIP window to the right and the Firefox window to the left.
3. Click on the Firefox window.

OBSERVED RESULT
The lower right half of the screen flickers

EXPECTED RESULT
No flicker

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 6.3.2
KDE Plasma Version: 6.3.2
KDE Frameworks Version: 6.11
Qt Version: 6.8.2

ADDITIONAL INFORMATION
Wayland with NVIDIA 4090 (Driver: 570.124.04)
Comment 1 fabiand 2025-03-03 08:29:20 UTC
Created attachment 179057 [details]
Screen Settings
Comment 2 fabiand 2025-03-03 08:29:32 UTC
Created attachment 179058 [details]
System Info
Comment 3 fabiand 2025-03-04 06:08:13 UTC
Created attachment 179099 [details]
Flicker Webm
Comment 4 fabiand 2025-03-04 08:40:59 UTC
This is possibly a nvidia bug: https://github.com/NVIDIA/open-gpu-kernel-modules/issues/801
Comment 5 TraceyC 2025-03-07 21:02:43 UTC
This does look like you're experiencing the same bug as you linked from the nvidia tracker.
I'm going to close this for now, since they'll have to resolve it on their end. Feel free to re-open this if that bug gets fixed and you still see the problem. Thanks!