Bug 429785

Summary: Window thumbnail images are invisible on Wayland
Product: [Plasma] plasmashell Reporter: AK-47 <chkboom>
Component: Task Manager and Icons-Only Task ManagerAssignee: Eike Hein <hein>
Status: RESOLVED DUPLICATE    
Severity: normal CC: plasma-bugs, till2.schaefer
Priority: NOR    
Version: 5.20.3   
Target Milestone: 1.0   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:
Attachments: Screenshot of issue

Description AK-47 2020-11-29 00:52:44 UTC
Created attachment 133718 [details]
Screenshot of issue

SUMMARY
Window thumbnails on the task bar are often invisible. The thumbnail pane itself shows, but no thumbnail image.

STEPS TO REPRODUCE
1. Hover over a window in the task bar.
2. Wait until the thumbnail pane pops up.

OBSERVED RESULT
There is no thumbnail image.

EXPECTED RESULT
The thumbnail image should appear.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Fedora Workstation 33
(available in About System)
KDE Plasma Version: 5.20.3
KDE Frameworks Version: 5.75.0
Qt Version: 5.15.1

ADDITIONAL INFORMATION
This is easiest to reproduce with X11 apps running under Wayland session.
The thumbnail does appear when the application window contents are updated (eg. playing video or image slideshow).
Comment 1 Till Schäfer 2020-11-29 15:48:47 UTC
I think this is a duplicate of Bug 427826. Feel free to reopen, if you think otherwise.

*** This bug has been marked as a duplicate of bug 427826 ***
Comment 2 AK-47 2020-11-30 06:32:16 UTC
Looks like it is, my apologies. Consider this report as extra information in relation to that bug.