https://bugs.kde.org/show_bug.cgi?id=510846
Bug ID: 510846
Summary: Transparent overlays cause checkerboard artifacts on
NVIDIA
Classification: Plasma
Product: kwin
Version First 6.4.5
Reported In:
Platform: EndeavourOS
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: compositing
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
On (my) NVIDIA GPU, transparent overlays are filled with checkerboard
artifacts, with color affecting the visibility. This is most pronounced if
Night Light is active, but can also be seen at the edge of window shadows.
STEPS TO REPRODUCE
1. Set theme to Breeze Dark (most visible against a grey background)
2. Enable Night Light and activate it
3. Scrub through the color temperature slider
OBSERVED RESULT
A rapidly-flickering checkerboard artifact appears, with its intensity varying
depending on the color.
Example: https://files.catbox.moe/64f13k.mp4
EXPECTED RESULT
Transparent overlays are free of artifacts.
SOFTWARE/OS VERSIONS
KDE Plasma Version: 6.4.5
KDE Frameworks Version: 6.19.0
Qt Version: 6.10.0
Kernel Version: 6.17.3-arch2-1 (64-bit)
ADDITIONAL INFORMATION
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 5800X3D 8-Core Processor
Memory: 32 GiB of RAM (31.3 GiB usable)
Graphics Processor: NVIDIA GeForce RTX 4060 Ti
I have replicated this on Fedora KDE 42 and Kubuntu 25.10
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