Bug 490871

Summary:	Monitor turns into SDR mode after kscreen-doctor --dpms off
Product:	[Plasma] kwin	Reporter:	laichiaheng
Component:	colour-management	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED UPSTREAM
Severity:	normal	CC:	natalie_clarius, nate, xaver.hugl
Priority:	NOR
Version First Reported In:	6.1.3
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	drm_info before kscreen-doctor -o before drm_info after kscreen-doctor -o after

Description laichiaheng 2024-07-27 01:50:41 UTC

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***

SUMMARY
Every time my monitor is suspended, it will wake up in SDR mode.
I tested it with kscreen-doctor --dpms off, it didn’t happen to the Gnome experimental HDR, I saw the problem only on KDE Plasma.

STEPS TO REPRODUCE
1. kscreen-doctor --dpms off
2. Wake up the monitor.

OBSERVED RESULT
The monitor turns into SDR mode.

EXPECTED RESULT
It should remains in HDR mode.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 6.1.3
(available in About System)
KDE Plasma Version: 6.1.3
KDE Frameworks Version: 6.4.0
Qt Version: 6.7.2

ADDITIONAL INFORMATION

Comment 1 Zamundaaa 2024-07-27 11:05:43 UTC

Please attach the output of kscreen-doctor -o and drm_info, once from before the issue and once after triggering it

Comment 2 laichiaheng 2024-07-27 13:19:55 UTC

Created attachment 172031 [details]
drm_info before

Comment 3 laichiaheng 2024-07-27 13:20:17 UTC

Created attachment 172032 [details]
kscreen-doctor -o before

Comment 4 laichiaheng 2024-07-27 13:20:36 UTC

Created attachment 172033 [details]
drm_info after

Comment 5 laichiaheng 2024-07-27 13:21:27 UTC

Created attachment 172034 [details]
kscreen-doctor -o after

Comment 6 laichiaheng 2024-07-27 13:22:18 UTC

(In reply to Zamundaaa from comment #1)
> Please attach the output of kscreen-doctor -o and drm_info, once from before
> the issue and once after triggering it

Done.

Comment 7 Zamundaaa 2024-07-27 13:28:21 UTC

KWin says HDR is still enabled, and the kernel agrees. This is some sort of driver bug, please report it to https://gitlab.freedesktop.org/drm/amd/-/issues

Comment 8 laichiaheng 2024-07-30 11:19:02 UTC

(In reply to Zamundaaa from comment #7)
> KWin says HDR is still enabled, and the kernel agrees. This is some sort of
> driver bug, please report it to
> https://gitlab.freedesktop.org/drm/amd/-/issues

Nobody responses there.

Comment 9 laichiaheng 2024-07-30 11:24:13 UTC

(In reply to laichiaheng from comment #8)
> (In reply to Zamundaaa from comment #7)
> > KWin says HDR is still enabled, and the kernel agrees. This is some sort of
> > driver bug, please report it to
> > https://gitlab.freedesktop.org/drm/amd/-/issues
> 
> Nobody responses there.

https://gitlab.freedesktop.org/drm/amd/-/issues/3514

Comment 10 Zamundaaa 2024-07-30 13:35:31 UTC

We can't do anything about the problem, but you need to have some patience. The issue has been open for just a single day.