Bug 494496

Summary:	Display lag when moving windows in Wayland
Product:	[Plasma] kwin	Reporter:	David S <dave>
Component:	wayland-generic	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	REPORTED ---
Severity:	normal	CC:	daltonminer, dave, duha.bugs, nate, p3ybnyhv
Priority:	NOR	Keywords:	regression, wayland
Version:	6.2.0
Target Milestone:	---
Platform:	openSUSE
OS:	Linux
See Also:	https://bugs.kde.org/show_bug.cgi?id=494382
Latest Commit:		Version Fixed In:
Sentry Crash Report:
Attachments:	Video showing issue

Description David S 2024-10-11 00:05:19 UTC

Created attachment 174661 [details]
Video showing issue

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SUMMARY
In Wayland only there is massive display lag moving windows around. This is true on a single or multiple monitors.


STEPS TO REPRODUCE
1. Install all available updates after 10/07/24
2. Log in using Wayland (no issues in x11)
3. Move windows around the screen

OBSERVED RESULT
Very noticeable lag moving windows to to point they tear in pieces and jump around

EXPECTED RESULT
Smooth, buttery motion

SOFTWARE/OS VERSIONS
(available in the Info Center app, or by running `kinfo` in a terminal window)
Operating System: openSUSE Tumbleweed 20241009
KDE Plasma Version: 6.2.0
KDE Frameworks Version: 6.6.0
Qt Version: 6.7.3
Kernel Version: 6.11.2-1-default (64-bit)
Graphics Platform: Wayland
Processors: 28 × Intel® Core™ i7-14700
Memory: 62.6 GiB of RAM
Graphics Processor: Mesa Intel® Graphics


ADDITIONAL INFORMATION
See attached video of issue. This goes away if I use X11 or if I revert to my snapshot from 10/7/24

Comment 1 duha.bugs 2024-10-11 21:22:27 UTC

This might be https://bugs.kde.org/show_bug.cgi?id=494382

Comment 2 David S 2024-10-13 15:19:07 UTC

(In reply to duha.bugs from comment #1)
> This might be https://bugs.kde.org/show_bug.cgi?id=494382

I reviewed 494382 and its very likely this is the same issue. Mine seems related to night light. 

What made this so confusing is it would be fine in the morning but NOT the evening! Right now its late morning and Im experiencing no issue, but night light hasnt activated yet. I turned it on manually and instant lag! For me at least, if I disable night light the issue is mostly if not totally fixed.