https://bugs.kde.org/show_bug.cgi?id=502334
Bug ID: 502334
Summary: Missing high-bit (HDR/WCG) support in Wayland on Dell
UP3216Q
Classification: Plasma
Product: kwin
Version: git-stable-Plasma/6.3
Platform: Kubuntu
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: colour-management
Assignee: kwin-bugs-n...@kde.org
Reporter: ody...@gmail.com
Target Milestone: ---
Created attachment 179947
--> https://bugs.kde.org/attachment.cgi?id=179947&action=edit
edid-decode output
SUMMARY
Missing high-bit (HDR/WCG) support in Wayland on Dell UP3216Q, although monitor
supports 30-bit colors, it is also seen via edid.
STEPS TO REPRODUCE
-
OBSERVED RESULT
1. "Display & Monitor" -> "Display Configuration" -> No HDR/WCG
2. kscreen-doctor -o -> HDR / Wide Color Gamut: incapable
EXPECTED RESULT
HDR and/or WCG functions.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Kubuntu 24.10
KDE Plasma Version: 6.1.5
KDE Frameworks Version: 6.6.0
Qt Version: 6.6.2.
ADDITIONAL INFORMATION
* Tested on KDE 6.3.3. (via Kubuntu 25.04 daily) with the same outcome.
* Dell UP3216Q is technically more of a "WCG monitor" with 10 bpc, although
back in 2015 I think they just called it HDR (?) as terminology was more flaky.
Under Windows it did run in HDR mode, when I tested some 4 years ago, not in
2015/2016 for sure.
* I will give KWIN_FORCE_ASSUME_HDR_SUPPORT a shot once on Kubuntu 25.04 as the
patch went to 6.3. production and comes with 6.3.4.
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