Bug 354878

Summary:	Closing the VLC video window crashes Kwin
Product:	[Plasma] kwin	Reporter:	Thomas Meiner <tho.mei>
Component:	core	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	crash	CC:	tho.mei
Priority:	NOR
Version:	5.4.2
Target Milestone:	---
Platform:	Fedora RPMs
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Thomas Meiner 2015-11-05 06:38:34 UTC

If I playing a video on Fedora 22 with VLC 2.2.2 and I close the video Window, Kwin crashes 100% reproducible. VLC sill works but I need to Kill Kwin with "kill -9 ..." and start a new instance.

Reproducible: Always

Steps to Reproduce:
1.  Open the VLC player and make sure, you have disabled the option "Integrate video in interface"  in the preferences of VLC.
2.  Play any kind of video.
3. Close the video window with a klick on the x-button in the kwin title bar.
4. Kwin crashes immediate. VLC is still alive and working.
5. Go to a console (ctrl+alt+F2) and kill all instances of Kwin with "kill -9 ...". Kill without the option "-9" does not terminate Kwin.
6. Change back to X and plasmaoidshell (ctrl+alt+F1)
7. alt+F2
8. start kwin again.
9. go back to step #1  ;-)

Actual Results:  
Kwin crashes

Expected Results:  
Kwin should not crash.

root@localhost ~ $ lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
01:00.0 VGA compatible controller: NVIDIA Corporation GF119M [Quadro NVS 4200M] (rev a1)

Comment 1 Martin Flöser 2015-11-05 07:20:40 UTC

can you provide a backtrace?

Comment 2 Thomas Lübking 2015-11-05 07:41:16 UTC

Probably not (kill -9 sounds like he's running into bug #353428)

Thomas (M. ;-), I'll bet you're using some aurorae theme (in doubt plastik) as window decoration and this does not happen when using the breeze decoration? (run "kcmshell5 kwindecoration")

Comment 3 Thomas Meiner 2015-11-05 08:53:31 UTC

(In reply to Thomas Lübking from comment #2)
> Probably not (kill -9 sounds like he's running into bug #353428)
> 
> Thomas (M. ;-), I'll bet you're using some aurorae theme (in doubt plastik)
> as window decoration and this does not happen when using the breeze
> decoration? (run "kcmshell5 kwindecoration")

You are right! With the awful Fedora standard theme (breeze) kwin don't crash. I used Diamod theme, which is aurora based. 
And, yes, #353428 talks about two kwin processes in ps output. The same I got.
Does it mean all Aurora based themes are causing the same bug?

Comment 4 Thomas Lübking 2015-11-05 09:00:50 UTC

probably bug #344278 - please re-check with 5.4.3
And yes, that covers *all* QML driven decos (inc. all aurorae themes)

-> pre-emptively duping, please re-open if it either happes with  5.4.3 or you can provide a backtrace (gdb into the stopped process) that proves counterwise.

*** This bug has been marked as a duplicate of bug 344278 ***