Bug 513194

Summary:	Total Freeze after using tiling keyboard shortcut on multiple Okular windows.
Product:	[Plasma] kwin	Reporter:	kde
Component:	general	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	NEEDSINFO WAITINGFORINFO
Severity:	major	CC:	nate
Priority:	NOR
Version First Reported In:	6.5.2
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description kde 2025-12-10 21:35:51 UTC

SUMMARY
I opened two pdfs in Okular. I then clicked on the taskbar-icon for okular, which showed me the preview of the two files. Next, I pushed 'meta'+'right-arrow' to tile the window to the right.
While it's to be expected that this is not trivial in this moment where I focused on the preview of two windows instead of focusing on one specific window, the result was very bad: the process of tiling somewhat started for both windows, starting to blurrily and slowly move to the right. However, at some point they froze and the whole system did so. No keyboard input or mouseclick changed anything. The only thing I managed to do is shut off the laptop by long-pressing the power button.

STEPS TO REPRODUCE
1. open two pdf files in okular
2. click on the icon in the taskbar
3. press 'meta' + 'arrow' to arrange the window.

OBSERVED RESULT
see above description. Sorry, I'm a bit in a rush ...

EXPECTED RESULT
tiling both windows at once or at least not crash.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: TuxedoOS
KDE Plasma Version: 6.5.2
KDE Frameworks Version: 6.19.0
Qt Version: 6.9.2

ADDITIONAL INFORMATION
I did not yet try to reproduce and am now just gonna send this report before trying again because I right now don't have the time to file the bug again if the system crashes. I hope to be able to comment on my reproduction-trials later on ...

Comment 1 kde 2025-12-10 21:36:26 UTC

I hope I chose the right affected software/category ...

Comment 2 kde 2025-12-10 21:38:21 UTC

I don't manage to reproduce it. And my description was probably not very accurate: the preview windows must have appeared on hover, not on clicking on the taskbar icon.
Probably not very useful bug report, feel free to ignore/delete/archive it if you can't do anything with it.

Comment 3 Nate Graham 2025-12-11 16:51:39 UTC

Are you using the X11 session, or the Wayland session? Does the issue happen in both session types, or only on X11?

Comment 4 kde 2025-12-14 16:10:38 UTC

(In reply to Nate Graham from comment #3)
> Are you using the X11 session, or the Wayland session? Does the issue happen
> in both session types, or only on X11?

I'm using wayland, on a tuxedo infinity flex 14; meaning I have an enabled touchscreen on my device.

I did not manage to reproduce the crash. (only tried in wayland, never used X11 as far as I know.)

I'll definitely have to look into how such a crash is logged to provide a better report if such a thing happens again ...