Bug 358891

Summary: Freeze on external screen plug/unplug
Product: [Plasma] kwin Reporter: Salvo "LtWorf" Tomaselli <tiposchi>
Component: platform-x11-nestedAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED DUPLICATE    
Severity: crash    
Priority: NOR    
Version: 5.4.3   
Target Milestone: ---   
Platform: Debian unstable   
OS: Linux   
Latest Commit: Version Fixed In:

Description Salvo "LtWorf" Tomaselli 2016-02-01 20:53:58 UTC 
I sometimes use an external screen on my laptop.

It is configured with systemsettings to disable the integrated screen whenever a VGA gets connected.

The screen I use has a different resolution than the integrated one, but also supports that resolution as non-native one.

The screen will work fine but when I click on the plasma taskbar and try to use it to change task, the windows decoration disappear.
However kwin doesn't actually crash, and I need to use killall -9 to actually kill the process so that I can spawn another instance of it.

Reproducible: Always

Steps to Reproduce:
1. Configure systemsettings so that only 1 screen is active at any time.
2. Plug an external screen
3. Click on the plasma bar to change active window
Comment 1 Thomas Lübking 2016-02-01 21:02:44 UTC 
KWin crashes because of bug #341497 (should be fixed with Qt 5.6 and potentially affects each and every Qt5 application) and drkonqi will hold a stopped process because of bug #353428 (hopefully fixed with KWin 5.6)

Duping to bug #353428 (which can occur for any crash), but do yourself a favor and do not touch the screen layout before Qt 5.6 - crashed me ksmserver (ie. the entire session) several times ... :-(

*** This bug has been marked as a duplicate of bug 353428 ***