[Bug 1425541] [NEW] kwin crashes on login and on resume from hibernate and suspend to RAM

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Application: kwin (4.11.11)
KDE Platform Version: 4.13.3 (Compiled from sources)
Qt Version: 4.8.6
Operating System: Linux 3.13.0-46-generic x86_64
Distribution: Ubuntu 14.04.2 LTS

-- Information about the crash:
- What I was doing when the application crashed:
This occurs somewhat regularly upon logging into kubuntu. On other instances it is when I return from either hibernate or suspend to RAM. The result is the windows have no title bar and cannot be closed. i have to restart the computer to get it to work again. Sometimes I have to restart several times. I tried to switch to a terminal and use killall kwin and then DISPLAY=:0 kwin to restart it but this has not yet worked.

The crash can be reproduced sometimes.

-- Backtrace:
Application: KWin (kwin), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[KCrash Handler]
#6  0x00007f167b332cc9 in __GI_raise (sig=sig at entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#7  0x00007f167b3360d8 in __GI_abort () at abort.c:89
#8  0x00007f1675677c92 in qt_message_output (msgType=<optimized out>, buf=0x2708cc8 "kwin(4327)/kdeui (kdelibs): Session bus not found \nTo circumvent this problem try the following command (with Linux and bash) \nexport $(dbus-launch) ") at global/qglobal.cpp:2383
#9  0x00007f1679f63be9 in QDebug::~QDebug (this=0x7fff179787e0, __in_chrg=<optimized out>) at /usr/include/qt4/QtCore/qdebug.h:85
#10 0x00007f167a03bdf8 in KApplicationPrivate::init (this=0x2663280, GUIenabled=GUIenabled at entry=true) at ../../kdeui/kernel/kapplication.cpp:516
#11 0x00007f167a03c7d2 in KApplication::KApplication (this=0x7fff17978f50, GUIenabled=true) at ../../kdeui/kernel/kapplication.cpp:352
#12 0x00007f167b73bc46 in KWin::Application::Application (this=0x7fff17978f50) at ../../kwin/main.cpp:311
#13 0x00007f167b73d6bf in kdemain (argc=1, argv=0x7fff17979098) at ../../kwin/main.cpp:573
#14 0x00007f167b31dec5 in __libc_start_main (main=0x4006d0 <main(int, char**)>, argc=1, argv=0x7fff17979098, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff17979088) at libc-start.c:287
#15 0x00000000004006fe in _start ()

Possible duplicates by query: bug 333347.

** Affects: kubuntu-meta (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: bot-comment
-- 
kwin crashes on login and on resume from hibernate and suspend to RAM
https://bugs.launchpad.net/bugs/1425541
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