Bug 515194

Summary: Wayland: Using ICC Profile produces glitches on some fade transitions.
Product: [Plasma] kwin Reporter: Antonio Orefice <kokoko3k>
Component: compositingAssignee: KWin default assignee <kwin-bugs-null>
Status: REPORTED ---    
Severity: normal    
Priority: NOR    
Version First Reported In: 6.5.5   
Target Milestone: ---   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: glitch

Description Antonio Orefice 2026-01-28 08:47:58 UTC
Created attachment 188982 [details]
glitch

I use a dual screen setup where each monitors uses an ICC profile which after applied makes the color tone colder than the uncalibrated stock.

When such profile is used the color uncorrected image pops in under some specific (albeit not 100% identified) conditions. One example is included from the attached file, it is simple-scan scanner application, where you can see that while the dropdown menu is showing it appears as yellowish, which is the color it would have witouth any ICC profile applied.


STEPS TO REPRODUCE
1.  apply an ICC profile to the screen un der Wayland
2. set color precision to high
3. open simple scan and in its preferences pull down the menu as showin in the attachment.

OBSERVED RESULT
The fade in effect appears as the color profile is not applied to it.

EXPECTED RESULT
Smooth , the color correction should be applied everytime

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 6.5.5
KDE Frameworks Version: 6.22.0
Qt Version: 6.10.1
Kernel Version: 6.18.6-arch1-1 (64-bit)
Graphics Platform: Wayland
Processors: 32 × Intel® Core™ i9-14900K
Memory: 64 GiB of RAM (62.5 GiB usable)
Graphics Processor: NVIDIA GeForce RTX 4060


ADDITIONAL INFORMATION
As a workaround, enabling the "night light" function even a bit (6400k) makes thing look right.