https://bugs.kde.org/show_bug.cgi?id=487604
Bug ID: 487604
Summary: built-in option for color correction doesn't work with
custom EDID override
Classification: Plasma
Product: kwin
Version: git-stable-Plasma/6.1
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: tempel.jul...@gmail.com
Target Milestone: ---
Created attachment 169864
--> https://bugs.kde.org/attachment.cgi?id=169864&action=edit
example custom EDID 2560x1440 60Hz
SUMMARY
According to AW EDID Editor (Windows), the attached EDID contains chromaticity
information, but no color correction happens when selecting built-in color
correction on KWin display settings KCM. It works with the display's default
EDID when no EDID override is in effect.
STEPS TO REPRODUCE
1. Configure to use a custom EDID as e.g. described in Arch wiki via
drm.edid_firmware=edid/your_edid.bin:
https://wiki.archlinux.org/title/kernel_mode_setting#Forcing_modes_and_EDID
(See the note about necessity to include it in initramfs, can be tricky on
other distributions.)
2. Go to KWin's display settings and choose built-in color correction values.
OBSERVED RESULT
Nothing happens vs. no calibration, unlike with default EDID.
EXPECTED RESULT
It should pick up the chromaticity values provided by the custom EDID. It seems
to work on Windows 11 with ACM feature or Radeon driver clamp also with custom
EDID.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 6.9.2
KDE Plasma Version: 6.1 beta 1 Arch
KDE Frameworks Version: 6.2
Qt Version: 6.7.1
ADDITIONAL INFORMATION
Radeon RX 7800 XT
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