Bug 483902

Summary:	KDE / application window become unresponsive if a message notification pops-up while hovering over the open windows in toolbar
Product:	[Plasma] plasmashell	Reporter:	Pedro Boschi <boschi>
Component:	Notifications	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED FIXED
Severity:	normal	CC:	boschi, kde, nate, plasma-bugs-null
Priority:	NOR	Keywords:	qt6
Version First Reported In:	6.0.2
Target Milestone:	1.0
Platform:	openSUSE
OS:	Linux
See Also:	https://bugs.kde.org/show_bug.cgi?id=478517
Latest Commit:		Version Fixed/Implemented In:	6.2.0
Sentry Crash Report:

Description Pedro Boschi 2024-03-18 13:57:06 UTC

SUMMARY
KDE / application window become unresponsive if a message notification pops-up while hovering over the open windows in toolbar.

STEPS TO REPRODUCE
1. Open a browser with two or more windows (not only tabs)
2. Open Konsole
3. Execute this in Konsole:
`sleep 5 && notify-send foo bar`
4. Immediately after the command above is entered in Konsole, hover the mouse button on top of the browser icon in the Toolbar, in order for the "thumbnails" of both windows to be displayed, and then hover the mouse over one of them, but DO NOT CLICK and keep the mouse pointer in place.
5. Wait until the notification from the command #3 to pop up.

OBSERVED RESULT
The hovered window will be displayed but will be unresponsive. On the other monitor the desktop wallpaper will be displayed.
In order to make things work again (return to being responsive) I simply hit Alt + Tab.

EXPECTED RESULT
The notification pop-up should not interfere with the windows browsing.

SOFTWARE/OS VERSIONS
KDE Plasma Version: 6.0.2
KDE Frameworks Version: 6.0.0
Qt Version: 6.6.2
Kernel Version: 6.7.9-1-default (64-bit)
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ i7-10510U CPU @ 1.80GHz
Memory: 15.4 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics
Manufacturer: Dell Inc.
Product Name: Vostro 5490

ADDITIONAL INFORMATION
Dual monitor setup.
Extended desktop, secondary screen placed on top of primary one.


Related to this issue:  https://bugs.kde.org/show_bug.cgi?id=478517

Comment 1 Nate Graham 2024-08-19 23:20:56 UTC

Thanks for the very detailed and high quality bug report, and I'm sorry we weren't able to get to it until now. Replicating your steps exactly, I can't reproduce the issue in Plasma 6.2. I tested with a playing YouTube video open in the browser window whose thumbnail I was hovering over, so make sure I could notice if it froze or got stuck; it didn't. I actually randomly happen to have the exact same CPU and GPU as you do, so we can even rule our GPU driver issues.

Therefore it seems like this issue may already be fixed in Plasma 6.2, and I'll mark it as such. However if after upgrading to Plasma 6.2, you find that you can still reproduce the issue, go ahead and re-open this ticket, and we'll investigate.

Thanks again!