Bug 450252

Summary: Overview effect shows blank rectangles instead of virtual desktop previews
Product: [Plasma] kwin Reporter: geisserml <geisserml>
Component: effects-overviewAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED WORKSFORME    
Severity: normal CC: nate
Priority: NOR    
Version First Reported In: 5.24.0   
Target Milestone: ---   
Platform: Neon   
OS: Linux   
See Also: https://bugs.kde.org/show_bug.cgi?id=507618
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: Screenshot of the bug

Description geisserml 2022-02-14 19:10:57 UTC 
Created attachment 146735 [details]
Screenshot of the bug

SUMMARY
The Overview effect does not show previews of the virtual desktops at the top as expected. Instead, there's only a white rectangle.

STEPS TO REPRODUCE
1. Open the overview effect
2. Take a look at the virtual desktop bar

OBSERVED RESULT
Blank rectangles (screenshot attached).

EXPECTED RESULT
Preview of the desktop as I've seen in screencasts from other users.

Operating System: KDE neon 5.24
KDE Plasma Version: 5.24.0
KDE Frameworks Version: 5.90.0
Qt Version: 5.15.3
Kernel Version: 5.13.0-28-generic (64-bit)
Graphics Platform: Wayland
Processors: 4 × Intel® Core™ i5-3570K CPU @ 3.40GHz
Memory: 7.2 GiB of RAM
Graphics Processor: llvmpipe

ADDITIONAL INFORMATION
Note that I have to use software rendering (`LIBGL_ALWAYAS_SOFTWARE=1`) due to this QtQuick bug: https://bugreports.qt.io/browse/QTBUG-99686
Comment 1 Vlad Zahorodnii 2022-02-14 19:15:38 UTC 
Those desktop previews are simply window thumbnails inside an item layer + rounded corners. This looks like a QtQuick bug.
Comment 2 geisserml 2022-02-14 19:17:11 UTC 
> This looks like a QtQuick bug.
Yeah, probably. QtQuick is very buggy on my system anyway, sadly.
Comment 3 geisserml 2022-02-14 19:44:07 UTC 
I just checked that this bug is also present without software rendering.
Comment 4 geisserml 2023-01-01 16:21:57 UTC 
Closing as the bug is gone since I switched distribution.