Bug 483388 - Parts of some QtWidgets apps are black and flickering with NVIDIA GPU
Summary: Parts of some QtWidgets apps are black and flickering with NVIDIA GPU
Status: RESOLVED WORKSFORME
Alias: None
Product: kwin
Classification: Plasma
Component: general (show other bugs)
Version: 6.0.2
Platform: Arch Linux Linux
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords: qt6
Depends on:
Blocks:
 
Reported: 2024-03-12 22:04 UTC by Lorenz Hoffmann
Modified: 2024-09-24 18:15 UTC (History)
1 user (show)

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Description Lorenz Hoffmann 2024-03-12 22:04:37 UTC
SUMMARY
***
NOTE: If you are reporting a crash, please try to attach a backtrace with debug symbols.
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***

Some time after starting the application, widgets start to flicker. They flicker between completely black and the normal, expected view. This resolves itself after some time, and later appears again. I only notice this in KSystemLog (for now).

STEPS TO REPRODUCE
1. Start the app
2. Wait a few seconds

OBSERVED RESULT
Widgets flicker between being completely black and normal.

EXPECTED RESULT
...they should not flicker.

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 6.0.1
KDE Frameworks Version: 6.0.0
Qt Version: 6.6.2
Kernel Version: 6.7.9-zen1-1-zen (64-bit)
Graphics Platform: Wayland
Processors: 12 × Intel® Core™ i5-10400F CPU @ 2.90GHz
Memory: 15.5 GiB of RAM
Graphics Processor: NVIDIA GeForce RTX 2080/PCIe/SSE2

ADDITIONAL INFORMATION
KSystemLog is installed from the arch repo.
Comment 1 Lorenz Hoffmann 2024-03-12 22:06:37 UTC
Hovering the mouse over some widgets can sometimes fix it. Thats why I think its the widgets flickering, not the whole window. Menubar and application bar at the top are not affected.
Comment 2 Lorenz Hoffmann 2024-03-13 08:17:44 UTC
This just happened with VLC as well, so it's not the app. My next guess is KWin?
Comment 3 Lorenz Hoffmann 2024-09-24 18:15:32 UTC
Haven't noticed this anymore for a long time.