https://bugs.kde.org/show_bug.cgi?id=527299
Bug ID: 527299
Summary: Colours wrong on Dell G2724D with "Prefer accuracy"
since Plasma 6.8.0; correct with "Prefer efficiency"
Classification: Plasma
Product: kwin
Version First 6.8.0
Reported In:
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: colour-management
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Target Milestone: ---
Created attachment 197258
--> https://bugs.kde.org/attachment.cgi?id=197258&action=edit
Dell on Prefer accuracy (colours wrong).
DESCRIPTION
After updating to Plasma 6.8.0, colours on my Dell G2724D now look wrong with
"Prefer accuracy" on. Whites have a tint, and some colours look washed out
while others look too strong/oversaturated. It looked correct on 6.7.5.
STEPS TO REPRODUCE
1. Connect a Dell G2724D over DisplayPort
2. In Display & Monitor, leave the colour profile on sRGB, with HDR and wide
colour gamut off
3. Set the colour power preference to "Prefer accuracy"
OBSERVED RESULT
Colours are wrong on the Dell. The screen displays tinted whites, and some
colours are washed-out whereas others are oversaturated.
EXPECTED RESULT
Colours should look the same as they did on Plasma 6.7.5.
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 6.8.0
KDE Frameworks Version: 6.31.0
Qt Version: 6.12.0
Kernel Version: 7.2.11-arch1-1 (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 7800X3D 8-Core Processor
Memory: 32 GiB of RAM (30.5 GiB usable)
Graphics Processor 1: AMD Radeon RX 7800 XT
Graphics Processor 2: AMD Ryzen 7 7800X3D 8-Core Processor
ADDITIONAL INFORMATION
Switching to "Prefer efficiency" fixes it immediately.
Resetting the monitor to factory settings didn't help. Neither did switching
the profile to EDID, forcing RGB range to Full, or enabling wide colour gamut.
My other monitor (ASUS ROG PG248Q) looks fine with "Prefer accuracy".
Forcing the colour resolution to 10 or 16 bits with “Prefer accuracy” makes no
difference. The colours are wrong either way.
Mesa: 26.2.5 (if relevant).
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