Bug 456057

Summary:	Transparent windows stuck in desktop
Product:	[Plasma] kwin	Reporter:	Heitor Toledo <heitortoledo>
Component:	compositing	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED FIXED
Severity:	normal	CC:	nate, pizzadude
Priority:	NOR
Version First Reported In:	5.25.1
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:
Attachments:	Demonstration of the phenomenon Demonstration of the phenomenon 2

Description Heitor Toledo 2022-06-28 00:00:41 UTC

Created attachment 150209 [details]
Demonstration of the phenomenon

SUMMARY
***
NOTE: If you are reporting a crash, please try to attach a backtrace with debug symbols.
See https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports
***

Sometimes, after closing a program, its window will remain stuck in the desktop with some transparency, as if it wasn't fully closed. It's not functional and you can't interact with the program.

Curiously, if you try to, for example, click and drag on your wallpaper, the effect created by the cursor goes "behind" the window. Pressing "Show Desktop" or entering edit mode also hides the window temporarily.

STEPS TO REPRODUCE
1. Unfortunately, I have seen this happening a few times, but I don't have steps to reproduce it. Seems to be non-deterministic. :( I remember this used to happen a lot in the past, then for some time I didn't observe this behavior, but now it happened again.

OBSERVED RESULT
There will be no stuck transparent window on my desktop when closing a window.

EXPECTED RESULT
The window completely disappears.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux, kernel version 5.18.6-arch1-1 (64-bit)
KDE Plasma Version: 5.25.1
KDE Frameworks Version: 5.95.0
Qt Version: 5.15.5

ADDITIONAL INFORMATION
None

Comment 1 Nate Graham 2022-06-28 18:44:29 UTC

Can you upgrade to 5.25.2 and see if it's fixed?

Comment 2 Heitor Toledo 2022-06-28 19:01:35 UTC

I've just upgraded, I will continue using it and report if I experience the issue again.

Comment 3 Heitor Toledo 2022-06-29 19:06:54 UTC

I confirm the bug is still present. Got a stuck Discord window this time.

Comment 4 Heitor Toledo 2022-06-29 19:07:56 UTC

Created attachment 150272 [details]
Demonstration of the phenomenon 2

Comment 5 Nate Graham 2022-06-30 16:29:25 UTC

Thanks. Sorry to hear that it's still happening. Are you using X11 or Wayland?

Comment 6 Heitor Toledo 2022-06-30 16:35:39 UTC

I'm currently using X11. But I don't mind switching to Wayland and testing it there as well.

Comment 7 p d 2022-07-23 01:42:05 UTC

I have this issue with Fedora KDE on Wayland, with Intel graphics. It usually happens when I'm moving a window and it disappears as I'm moving it, and a transparent version of it gets stuck on the desktop.

Operating System: Fedora Linux 36
KDE Plasma Version: 5.25.3
KDE Frameworks Version: 5.96.0
Qt Version: 5.15.3
Kernel Version: 5.18.11-200.fc36.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 4 × Intel® Core™ i5-7300U CPU @ 2.60GHz
Memory: 7.5 GiB of RAM
Graphics Processor: Mesa Intel® HD Graphics 620
System Version: ThinkPad T580

Comment 8 p d 2023-05-13 10:39:36 UTC

this no longer happens for me

Comment 9 Heitor Toledo 2023-05-13 19:25:20 UTC

Yeah, I also haven't seen this bug again. Thanks to everyone who was involved in fixing this.