https://bugs.kde.org/show_bug.cgi?id=496991
Bug ID: 496991
Summary: Display brightness too low with HDR
Classification: Plasma
Product: kwin
Version: 6.2.4
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: kwin-bugs-n...@kde.org
Reporter: akhilkalwakur...@gmail.com
Target Milestone: ---
Created attachment 176324
--> https://bugs.kde.org/attachment.cgi?id=176324&action=edit
Monitor EDID
SUMMARY
Screen brightness is too low even at max brightness when HDR is enabled.
I don't have an exact value but, here is what I tried:
1. Windows (HDR on & off) -> can read the display content comfortably under
sunlight
2. Plasma with HDR off -> can read the display content comfortably under
sunlight
3. Plasma with HDR on -> can't read the display content even in a brightly lit
room.
I also tried HDR videos with MPV.
1. With HDR enabled, dark scenes are too dark with no details.
2. With HDR disabled, dark scenes are viewable
3. On windows, dark scenes are viewable with both HDR on or off
** When HDR is disabled in Plasma, I'm using the built-in color profile
** My GPU is intel UHD iGPU
STEPS TO REPRODUCE
1. Enable HDR in settings
2. Set SDR brightness to maximum and brightness to maximum -> notice the max
brightness
3. Disable HDR in settings
4. Set brightness to maximum -> notice the max brightness
OBSERVED RESULT
1. Brightness when HDR enabled is too low.
2. HDR videos played in MPV with dark scenes look black.
EXPECTED RESULT
1. Brightness with HDR enabled or disabled to be similar
SOFTWARE/OS VERSIONS
Windows: Version 24H2 (OS Build 26100.2454)
Linux/KDE Plasma: Arch Linux
KDE Plasma Version: 6.2.4
KDE Frameworks Version: 6.9.0
Qt Version: 6.8.0
ADDITIONAL INFORMATION
I'm attaching my display EDID if that helps.
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