[kde] [Bug 508872] New: Display keeps getting engaged as 30-bit when it should be 24-bit
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bugzilla_noreply at kde.org
Thu Aug 28 21:25:42 BST 2025
https://bugs.kde.org/show_bug.cgi?id=508872
Bug ID: 508872
Summary: Display keeps getting engaged as 30-bit when it should
be 24-bit
Classification: I don't know
Product: kde
Version First unspecified
Reported In:
Platform: NixOS
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: general
Assignee: unassigned-bugs at kde.org
Reporter: EntranceJew at gmail.com
Target Milestone: ---
Created attachment 184535
--> https://bugs.kde.org/attachment.cgi?id=184535&action=edit
monitor OSD showing color settings
SUMMARY
KWin keeps engaging my monitors at 30-bit color instead of 24-bit color,
causing graphical instability. It happens on the DRM drivers, and the open
drivers.
STEPS TO REPRODUCE
1. set KWIN_DRM_PREFER_COLOR_DEPTH=24
2. that does not occur
OBSERVED RESULT
monitor shows 30-bit color, unlike on Windows
EXPECTED RESULT
monitor shows 24-bit color like on Windows
SOFTWARE/OS VERSIONS
Operating System: NixOS 25.05
KDE Plasma Version: 6.3.6
KDE Frameworks Version: 6.14.0
Qt Version: 6.9.1
Kernel Version: 6.12.43 (64-bit)
Graphics Platform: Wayland
Processors: 16 × 11th Gen Intel® Core™ i9-11900K @ 3.50GHz
Memory: 125.6 GiB of RAM
Graphics Processor: NVIDIA GeForce RTX 3070 Ti
ADDITIONAL INFORMATION
https://gist.github.com/EntranceJew/006b8d2253aec9e2ba5d12e0a1e90cbf
https://github.com/entrancejew/dot-nix
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