Bug 458328

Summary: when changing windows with Alt + Tab and arrows yellow square appears in right bottom corner above clock
Product: [Plasma] kwin Reporter: empyreal <empyreal>
Component: effects-tabboxAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED FIXED    
Severity: normal CC: nate
Priority: NOR    
Version First Reported In: 5.25.4   
Target Milestone: ---   
Platform: Kubuntu   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: yellow square with text

Description empyreal 2022-08-26 07:23:42 UTC 
SUMMARY
It start happening after recent update.

STEPS TO REPRODUCE
1.  Alt + Tab
2. Square appears
3. Hold Alt
4. Arrow
5. Square disappears
6. Arrow
7. Square appears

OBSERVED RESULT
When changing windows with arrows yellow square appears every second Arrow key or Alt + Tab press

EXPECTED RESULT
No unidentified squares above the clock

SOFTWARE/OS VERSIONS
Operating System: Kubuntu 22.10
KDE Plasma Version: 5.25.4
KDE Frameworks Version: 5.97.0
Qt Version: 5.15.4
Kernel Version: 5.15.0-46-generic (64-bit)
Graphics Platform: X11
Comment 1 Nate Graham 2022-08-30 19:39:55 UTC 
Seems like graphical corruption.

Is the square at all interactive?

What graphics hardware are you using?
Comment 2 empyreal 2022-09-01 09:32:55 UTC 
Created attachment 151757 [details]
yellow square with text
Comment 3 empyreal 2022-09-01 09:35:29 UTC 
GPU 0: NVIDIA GeForce GTX 1660. It's not graphical corruption.
I can type in this square. Now this square is "always on" on desktop, as on screenshot.
Comment 4 Nate Graham 2022-09-01 13:46:27 UTC 
Looks like that's a Notes widget that lives on your desktop.

You can move it by clicking-and-holding and then dragging it elsewhere.

The fact that it appears while you alt-tab is probably because of the default setting to hide other windows, so parts of the desktop appear. Evidently the part of the desktop that shows this widget is being shown.
Comment 5 empyreal 2022-09-01 18:18:33 UTC 
I can't move it. I removed it in edit mode. I do not use notes, sticky notes, whatever... I didn't add any widgets. This thing appeared after upgrade. That's strange.