Bug 506101

Summary:	Some windows from other virtual desktops appear frozen and only show the last frame when invoking the Grid / Overview Effect
Product:	[Plasma] kwin	Reporter:	postix <postix>
Component:	general	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED FIXED
Severity:	normal	CC:	bastimeyer123, kdedev, nate
Priority:	NOR	Keywords:	regression
Version First Reported In:	6.4.0
Target Milestone:	---
Platform:	Other
OS:	Linux
See Also:	https://bugs.kde.org/show_bug.cgi?id=456280
Latest Commit:	d80fea283f911f6ec106e1799f877dc920906293	Version Fixed/Implemented In:	6.4.2
Sentry Crash Report:

Description postix 2025-06-24 10:10:17 UTC

SUMMARY

Similar / same bug as bug #456280.

Depending on the application, some windows on other virtual desktops stop rendering continuously, when invoking the Grid or Overview Effect.

STEPS TO REPRODUCE
1. Open Chromium or Konsole and MPV on desktop B
2. Make sure that these apps show some animation
3. Open the Grid Effect on desktop A

OBSERVED RESULT
- Chromium and Konsole only show the last frame.
+ MPV keeps rendering.

EXPECTED RESULT
Any window from any other virtual desktops is rendered in real time.

SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 42
KDE Plasma Version: 6.4.0
KDE Frameworks Version: 6.15.0
Qt Version: 6.9.1
Kernel Version: 6.15.3-200.fc42.x86_64 (64-bit)
Graphics Platform: Wayland

Comment 1 TraceyC 2025-06-25 20:32:07 UTC

I can reproduce this in git-master

Comment 2 postix 2025-06-30 15:05:32 UTC

https://invent.kde.org/plasma/kwin/-/merge_requests/7829 reads as if it could have fixed this issue - but not sure as I'm not a kwin dev. :-)

Comment 3 bastimeyer123 2025-06-30 15:40:09 UTC

(In reply to postix from comment #2)
> https://invent.kde.org/plasma/kwin/-/merge_requests/7829 reads as if it
> could have fixed this issue - but not sure as I'm not a kwin dev. :-)

I've just built from the cherry-picked commit on the `Plasma/6.4` branch (d80fea283f911f6ec106e1799f877dc920906293), and the commit did indeed fix the issue. Thanks! The commit's body text should've included this bug id.

Comment 4 postix 2025-06-30 15:51:12 UTC

Thanks, I set it to resolved fixed then! \o