https://bugs.kde.org/show_bug.cgi?id=515122
Bug ID: 515122
Summary: KWin Wayland 6.5.x sometimes initializes wrong
color/sharpness on external monitor; fixed by
kwin_wayland --replace
Classification: Plasma
Product: kwin
Version First 6.5.5
Reported In:
Platform: EndeavourOS
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: xwayland
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
On Plasma 6.5.5 (Wayland), external monitors connected via DisplayPort
sometimes initialize with incorrect color/sharpness after login.
Symptoms:
- Colors appear over-saturated / HDR-like
- Text looks extremely sharp or over-processed
- Gamma, brightness, and color settings have no effect
- Issue occurs non-deterministically (sometimes fixed after reboot)
Running:
kwin_wayland --replace &
immediately fixes the issue without logging out, suggesting a KWin Wayland
initialization bug in the color/scaling pipeline.
Environment:
- Plasma: 6.x
- KWin: 6.5.5
- Session: Wayland
- External monitor via DisplayPort
- Distribution: EndeavourOS (Arch-based)
The issue does not occur when using Plasma (X11).
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