https://bugs.kde.org/show_bug.cgi?id=515266
Bug ID: 515266
Summary: New plasma releases break secondary display color for
some apps
Classification: Plasma
Product: kwin
Version First 6.5.5
Reported In:
Platform: Neon
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: colour-management
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Target Milestone: ---
After updating to Plasma 6.5.5 (tested on KDE Neon 24.04 and Fedora 43), an
issue crops up where if I launch a chrome-based browser (maybe other XWayland
apps too?) on my laptop screen and then drag them to a secondary monitor, they
appear in what looks like 256 colors mode. Relaunching on ext screen fixes the
issue. None of the displays support HDR.
99% sure this is KDE bug and not Chrome given it has been happening since the
update. Definitely happened in last 2 weeks. Replicated on AMD and Intel
platforms.
STEPS TO REPRODUCE
1. Connect laptop to external display
2. Launch a Chromium browser on internal display
3. Drag to secondary screen
OBSERVED RESULT
Dragging some apps to ext screen drops color mode
EXPECTED RESULT
No change in color mode
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: KDE Neon 24.04, Fedora 43
KDE Plasma Version: 6.5.5 (from neon system)
KDE Frameworks Version: 6.22.0 (from neon system)
Qt Version: 6.10.1 (from neon system)
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