Bug 428010

Summary: Thumbnail Aside doesn't update thumbnail across Activities
Product: [Plasma] kwin Reporter: Schlaefer <openmail+kde>
Component: effects-variousAssignee: KWin default assignee <kwin-bugs-null>
Status: REPORTED ---    
Severity: normal CC: hyunkang2019
Priority: NOR    
Version First Reported In: 5.25.1   
Target Milestone: ---   
Platform: Arch Linux   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Schlaefer 2020-10-20 06:17:09 UTC 
SUMMARY

A Thumbnail Aside overlay is only updated if the parent window is visible on the same Activity.

STEPS TO REPRODUCE
1. Open a window (e.g. playing a video) on Activity A
2. Show a thumbnail aside for that window on Activity A
3. Switch to Activity B

OBSERVED RESULT

The thumbnail is no longer updated and shows a still image.

EXPECTED RESULT

The thumbnail should still be updated.

SOFTWARE/OS VERSIONS
Operating System: EndeavourOS
KDE Plasma Version: 5.20.0
KDE Frameworks Version: 5.75.0
Qt Version: 5.15.1
Kernel Version: 5.9.1-zen2-1-zen

ADDITIONAL INFORMATION

This seems to be a regression in 5.20?
Comment 1 Schlaefer 2022-02-03 15:03:26 UTC 
Seems to work again.
Comment 2 Hyuk 2022-06-28 12:32:42 UTC 
(In reply to Schlaefer from comment #1)
> Seems to work again.

I'm having similar issue with this effect since 5.25. When I play youtube in fullscreen and enable this effect before minimizing the window, it used to play the streaming flawlessly up until 5.24 but now it looks like it only updates the video thumbnail when either mouse is hovered over a panel or virtual desktop is switching constantly. Is this a known bug? This kwin effect was one of my favorite since I like playing youtube in the background while working. I really miss this feature and hope KDE will bring it back soon. Thanks
Comment 3 Schlaefer 2022-06-28 12:51:13 UTC 
Situation with 5.25 here: Minimizing the source window or having it on a different activity/virtual desktop stops updating the thumbnail.