Bug 501072

Summary:	HDR saturated SDR content
Product:	[Plasma] kwin	Reporter:	Mannubus <drchaos820>
Component:	colour-management	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	REPORTED ---
Severity:	normal	CC:	kdedev, xaver.hugl
Priority:	NOR
Version First Reported In:	6.3.2
Target Milestone:	---
Platform:	CachyOS
OS:	Linux
See Also:	https://bugs.kde.org/show_bug.cgi?id=486725
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Mannubus 2025-03-04 20:44:24 UTC

SUMMARY
All sRGB colors are over saturated and i can't use the sRGB color intensity slider because it does not change anything

STEPS TO REPRODUCE
1. Enable HDR

OBSERVED RESULT
All SDR content is over saturated and the slider for sRGB color intensity is not working properly

EXPECTED RESULT
Being able to adjust the color intensity of sRGB content 

SOFTWARE/OS VERSIONS
Linux: CachyOS/Arch
KDE Plasma Version: 6.3.2
KDE Frameworks Version: 6.11.0
Qt Version: 6.8.2

ADDITIONAL INFORMATION
I tried a lot of things even using another KERNEL

Comment 1 Zamundaaa 2025-03-04 23:14:28 UTC

Can you test the same display with Windows or MacOS, to check if it also happens there?

If it just applies a weird color transformation that does this (I wouldn't be surprised), perhaps we could allow the sRGB slider to go below 0% to at least somewhat compensate for it.

Comment 2 Mannubus 2025-03-05 20:23:27 UTC

(In reply to Zamundaaa from comment #1)
> Can you test the same display with Windows or MacOS, to check if it also
> happens there?
> 
> If it just applies a weird color transformation that does this (I wouldn't
> be surprised), perhaps we could allow the sRGB slider to go below 0% to at
> least somewhat compensate for it.

I only tested on Windows and it works fine there

Comment 3 Bug Janitor Service 2025-03-20 03:47:05 UTC

🐛🧹 ⚠️ This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information, then set the bug status to REPORTED. If there is no change for at least 30 days, it will be automatically closed as RESOLVED WORKSFORME.

For more information about our bug triaging procedures, please read https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging.

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Comment 4 Zamundaaa 2025-04-02 16:03:51 UTC

What color temperature do you have night light set to?
It seems like your monitor is just shy of sRGB, so if you have night light set to very low color temperatures, that could cause this sort of issue to appear when it wouldn't without a color profile (which makes KWin assume the screen is perfect sRGB)

Comment 5 Zamundaaa 2025-04-02 16:11:13 UTC

Oops, that went into the wrong tab.

Comment 6 Mannubus 2025-04-03 00:55:35 UTC

(In reply to Zamundaaa from comment #4)
> What color temperature do you have night light set to?
> It seems like your monitor is just shy of sRGB, so if you have night light
> set to very low color temperatures, that could cause this sort of issue to
> appear when it wouldn't without a color profile (which makes KWin assume the
> screen is perfect sRGB)

I have it turned off all the time, i tried turning it on and off and no change aswell