Bug 381874

Summary:	[Wayland] Kpat crashes at first move
Product:	[Plasma] kwin	Reporter:	tromzy
Component:	wayland-generic	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED WORKSFORME
Severity:	normal	CC:	kde-games-bugs-null
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description tromzy 2017-07-01 18:21:09 UTC

On a Wayland session, Kpat hangs the whole session completely as soon as I try to click a card. I cannot close the game, nor launch Krunner or any other Plasma element or application. I cannot even switch to a TTY and I have to shutdown the computer by long pressing the power button.

Steps to reproduce : 

- Launch a Plasma Wayland session
- Launch Kpat
- Launch a game (I tried Klondike and Freecell)
- Try to move a card : the whole session hangs

Plasma 5.10.3, Frameworks 5.35, Qt 5.9.1.

Comment 1 Albert Astals Cid 2017-07-02 10:07:09 UTC

I'm assigning this to KWin since tbh it seems more a problem of KWin (or its stack, i.e. driver, kernel, whatever) than of KPat.

Comment 2 Martin Flöser 2017-07-02 10:39:10 UTC

Cannot reproduce in a session with Qt 5.7

Comment 3 Martin Flöser 2017-07-02 11:59:44 UTC

Also cannot reproduce in a Qt 5.9 session.

Are you still able to move the mouse?

Comment 4 tromzy 2017-07-03 09:14:00 UTC

The mouse moves very sluggishly for a few seconds and then it freezes.

Comment 5 Martin Flöser 2017-07-03 14:49:58 UTC

The question is whether KWin freezes. Can you turn on the show fps effect to see whether the compositor is still active?

Comment 6 Christoph Feck 2017-07-17 04:21:56 UTC

If you can provide the information requested in comment #5, please add it.

Comment 7 Christoph Feck 2017-07-31 13:44:13 UTC

To further investigate this issue, KDE developers need the information requested in comment #5. If you can provide it, or need help with finding that information, please add a comment.

Comment 8 tromzy 2017-08-07 13:00:01 UTC

I am sorry for the late reply, I was on holiday and did not have my computer with me.

Anyway, I tried again and turned the "Show FPS" effect on, and I am not able to reproduce the bug : it seems to be fixed somehow. I upgraded to Plasma 5.9.4 so maybe that is what solved the bug ? If it happens again I'll let you know.

Comment 9 tromzy 2017-08-07 13:02:03 UTC

I meant Plasma 5.10.4, not 5.9.4.

Comment 10 Martin Flöser 2017-08-07 14:52:21 UTC

setting to worksforme as of latest comment.

Thanks for the update.