Bug 435051

Summary: Minimizing window loses thumbnails
Product: [Plasma] kwin Reporter: Dan Dascalescu <ddascalescu+kde>
Component: generalAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED WORKSFORME    
Severity: normal CC: nate
Priority: NOR    
Version First Reported In: 5.21.3   
Target Milestone: ---   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: Screencast

Description Dan Dascalescu 2021-03-28 08:30:45 UTC
Created attachment 137123 [details]
Screencast

SUMMARY
Minimizing a window resets its thumbnail to the icon of the application. Feel free to close if this is intended, e.g. to prevent redraw cycles.

Similarly, invoking the keyboard shortcut to "MinimizeAll" [sic, no space between the two words in System Settings -> Shortcuts -> Kwin"], resets the window thumbnails to the icons of the applications.

STEPS TO REPRODUCE
1. Mouse over panel buttons and notice the rendered thumbnails
2. Invoke MinimizeAll
3. Mouse over again

OBSERVED RESULT
Thumbnails are reset to the icons of the applications.

EXPECTED RESULT
Thumbnails stay rendered.
Comment 1 Nate Graham 2021-03-31 04:19:53 UTC
You want System Settings > Display & Monitor > Compositing > Keep window Thumbnails: Always. When you tell it to do this, it will display a message indicating the trade-offs that prevent this from being the default setting. :)