https://bugs.kde.org/show_bug.cgi?id=516731
Bug ID: 516731
Summary: Direct scanout looks bad with ICC profile or with HDR
Classification: Plasma
Product: kwin
Version First 6.6.1
Reported In:
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: colour-management
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Target Milestone: ---
SUMMARY
Direct scanout looks different/worse with ICC profile or with HDR than
compositing
STEPS TO REPRODUCE
1. Load ICC profile which (currently) allows direct scanout (synthetic example
ICC attached) or enable HDR.
2. Disable night light, because it blocks direct scanout (should it block?).
2. Go full screen with e.g. video player and make sure direct scanout is used.
3. Observer colors/brightness of entire scene and observe highlights.
OBSERVED RESULT
Image with direct scanout has notably worse quality especially at highlights
and with a little bit different brightness/colors. Attached monitor photos.
EXPECTED RESULT
The same image as in compositing.
SOFTWARE/OS VERSIONS
KDE Plasma Version: 6.6.1
KDE Frameworks Version: 6.23.0
Qt Version: 6.10.2
ADDITIONAL INFORMATION
Majaro 6.19.3 kernel without custom
"0000-amd-display-move-AMD_PRIVATE_COLOR-to-Kconfig.patch" patch which prevents
direct scanout with color management.
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