Bug 493438

Summary:	Applying an ICC profile causes a lag in a VM
Product:	[Plasma] kwin	Reporter:	Amir <crazycableguy>
Component:	colour-management	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	kde, nate, p3ybnyhv, sven
Priority:	NOR
Version First Reported In:	6.1.90
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Amir 2024-09-21 13:49:04 UTC

SUMMARY
There's a noticeable lag when moving windows or watching videos after enabling an ICC profile.
I've reproduced the issue in a Neon unstable VM, where it's more pronounced.

STEPS TO REPRODUCE
1. Apply an ICC profile for the display, e.g. /usr/share/color/icc/colord/Bluish.icc
2. Play a video in the browser.
3. Move a window around.

OBSERVED RESULT
Moving the window feels like low refresh rate, and the video gets laggy if not completely freezing while moving the window.

EXPECTED RESULT
Moving the window and playing the video to feel the same as without applying an ICC profile.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Neon unstable
KDE Plasma Version: 6.1.90
KDE Frameworks Version: 6.7.0
Qt Version: 6.7.2

ADDITIONAL INFORMATION
VM was using llvmpipe, and bare metal was using amdgpu.

Comment 1 Amir 2024-09-21 13:57:23 UTC

I've just read the discussion at bug 477223, I'll add that I started encountering it in the 6.2 beta so I don't believe it's the same issue as the original bug.

Comment 2 David Edmundson 2024-10-16 13:23:53 UTC


*** This bug has been marked as a duplicate of bug 494382 ***

Comment 3 Nate Graham 2024-10-22 17:27:51 UTC


*** This bug has been marked as a duplicate of bug 477223 ***