Application: kwin_x11 (5.2.90)

Qt Version: 5.4.0
Operating System: Linux 3.18.0-13-generic x86_64
Distribution: Ubuntu Vivid Vervet (development branch)

-- Information about the crash:
- What I was doing when the application crashed:

I tried to log in via gdm. Simply selected plasma, and without the loading screen applications simply started to start. (No background change either.)

The KWin crashed dialog only appears after I hit alt-tab rapidly a few times. Right after login while pidgin, skype and keepass started I got 3 plasmashell crashed dialogs.

-- Backtrace:
Application: KWin (kwin_x11), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f540573d840 (LWP 2874))]

Thread 5 (Thread 0x7f53e086a700 (LWP 2883)):
#0  0x00007f54052070fd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f53fc964e5c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f53fc9651e2 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f53e73f74b6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f53fc98b8a5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f53fce840a5 in start_thread (arg=0x7f53e086a700) at pthread_create.c:309
#6  0x00007f54052115ad in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7f53dbfff700 (LWP 2884)):
#0  0x00007f54052070fd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f53fc964e5c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f53fc964f6c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f53fc964fa9 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f53fc98b8a5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f53fce840a5 in start_thread (arg=0x7f53dbfff700) at pthread_create.c:309
#6  0x00007f54052115ad in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7f53d9578700 (LWP 2890)):
#0  0x00007f5405208f23 in select () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f5403a66fa1 in qt_safe_select (nfds=24, fdread=fdread@entry=0x7f53c8000a78, fdwrite=fdwrite@entry=0x7f53c8000d08, fdexcept=fdexcept@entry=0x7f53c8000f98, orig_timeout=orig_timeout@entry=0x0) at kernel/qcore_unix.cpp:75
#2  0x00007f5403a68b5c in select (timeout=0x0, exceptfds=0x7f53c8000f98, writefds=0x7f53c8000d08, readfds=0x7f53c8000a78, nfds=<optimized out>, this=0x7f53c80008c0) at kernel/qeventdispatcher_unix.cpp:320
#3  QEventDispatcherUNIXPrivate::doSelect (this=this@entry=0x7f53c80008e0, flags=..., flags@entry=..., timeout=timeout@entry=0x0) at kernel/qeventdispatcher_unix.cpp:196
#4  0x00007f5403a690d5 in QEventDispatcherUNIX::processEvents (this=0x7f53c80008c0, flags=...) at kernel/qeventdispatcher_unix.cpp:607
#5  0x00007f5403a10392 in QEventLoop::exec (this=this@entry=0x7f53d9577d60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f54037cfa94 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f53fdcb46a5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f54037d4a4e in QThreadPrivate::start (arg=0x15cf5b0) at thread/qthread_unix.cpp:337
#9  0x00007f53fce840a5 in start_thread (arg=0x7f53d9578700) at pthread_create.c:309
#10 0x00007f54052115ad in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7f53c3fff700 (LWP 2891)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f54025de684 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f54025de6c9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f53fce840a5 in start_thread (arg=0x7f53c3fff700) at pthread_create.c:309
#4  0x00007f54052115ad in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f540573d840 (LWP 2874)):
[KCrash Handler]
#5  0x00007f540514de37 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#6  0x00007f540514f528 in __GI_abort () at abort.c:89
#7  0x00007f54037c1e5f in qt_message_fatal (context=..., message=...) at global/qlogging.cpp:1414
#8  QMessageLogger::fatal (this=this@entry=0x7fff53641150, msg=msg@entry=0x7f53eec29f26 "Could not initialize GLX") at global/qlogging.cpp:639
#9  0x00007f53eebede80 in QGLXContext::init (this=0x16fa190, screen=0x123f060, share=0x0) at qglxintegration.cpp:303
#10 0x00007f53eebc75eb in QXcbIntegration::createPlatformOpenGLContext (this=<optimized out>, context=0x7fff53641250) at qxcbintegration.cpp:235
#11 0x00007f5403da029b in QOpenGLContext::create (this=this@entry=0x7fff53641250) at kernel/qopenglcontext.cpp:596
#12 0x00007f53eebee24a in QGLXContext::queryDummyContext () at qglxintegration.cpp:657
#13 0x00007f53eebee3f1 in QGLXContext::supportsThreading () at qglxintegration.cpp:688
#14 0x00007f540285e6bb in QSGRenderLoop::instance() () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#15 0x00007f5402890d4d in QQuickWindowPrivate::init(QQuickWindow*, QQuickRenderControl*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#16 0x00007f53432d0f4c in PlasmaQuick::Dialog::Dialog (this=0x176ac40, parent=<optimized out>) at ../../../src/plasmaquick/dialog.cpp:650
#17 0x00007f53435449d0 in QQmlElement (this=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtQml/qqmlprivate.h:93
#18 QQmlPrivate::createInto<PlasmaQuick::Dialog> (memory=0xb3a) at /usr/include/x86_64-linux-gnu/qt5/QtQml/qqmlprivate.h:102
#19 0x00007f53fdc4801b in QQmlType::create() const () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#20 0x00007f53fdcafe8a in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#21 0x00007f53fdcb1785 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#22 0x00007f53fdcb2489 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#23 0x00007f53fdcaea0d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#24 0x00007f53fdcaf6bd in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#25 0x00007f53fdcb0624 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#26 0x00007f53fdc31f85 in QQmlComponentPrivate::beginCreate(QQmlContextData*) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#27 0x00007f53fdc323dc in QQmlComponent::create(QQmlContext*) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#28 0x00007f5404e5ecb2 in KWin::TabBox::TabBoxHandlerPrivate::createSwitcherItem (this=this@entry=0x1416590, desktopMode=desktopMode@entry=false) at ../tabbox/tabboxhandler.cpp:291
#29 0x00007f5404e60104 in KWin::TabBox::TabBoxHandlerPrivate::show (this=0x1416590) at ../tabbox/tabboxhandler.cpp:324
#30 0x00007f5404e60369 in KWin::TabBox::TabBoxHandler::show (this=0x122ae40) at ../tabbox/tabboxhandler.cpp:380
#31 0x00007f5404e520c7 in KWin::TabBox::TabBox::show (this=<optimized out>) at ../tabbox/tabbox.cpp:736
#32 0x00007f5404e7cab5 in KWin::TabBox::TabBox::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at moc_tabbox.cpp:174
#33 0x00007f5403a43959 in QMetaObject::activate (sender=sender@entry=0x1413d28, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3716
#34 0x00007f5403a43fe7 in QMetaObject::activate (sender=sender@entry=0x1413d28, m=m@entry=0x7f5403c6d580 <QTimer::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3582
#35 0x00007f5403ac3480 in QTimer::timeout (this=this@entry=0x1413d28) at .moc/moc_qtimer.cpp:192
#36 0x00007f5403a518a8 in QTimer::timerEvent (this=0x1413d28, e=<optimized out>) at kernel/qtimer.cpp:247
#37 0x00007f5403a44683 in QObject::event (this=0x1413d28, e=<optimized out>) at kernel/qobject.cpp:1267
#38 0x00007f540431b2ec in QApplicationPrivate::notify_helper (this=0x121bd80, receiver=0x1413d28, e=0x7fff536422e0) at kernel/qapplication.cpp:3722
#39 0x00007f5404320960 in QApplication::notify (this=0x7fff53642520, receiver=0x1413d28, e=0x7fff536422e0) at kernel/qapplication.cpp:3505
#40 0x00007f5403a12bdb in QCoreApplication::notifyInternal (this=0x7fff53642520, receiver=0x1413d28, event=event@entry=0x7fff536422e0) at kernel/qcoreapplication.cpp:932
#41 0x00007f5403a6a945 in sendEvent (event=0x7fff536422e0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#42 QTimerInfoList::activateTimers (this=0x12e3858) at kernel/qtimerinfo_unix.cpp:635
#43 0x00007f5403a68530 in QEventDispatcherUNIX::activateTimers (this=this@entry=0x1209690) at kernel/qeventdispatcher_unix.cpp:549
#44 0x00007f5403a690a3 in QEventDispatcherUNIX::processEvents (this=0x1209690, flags=flags@entry=...) at kernel/qeventdispatcher_unix.cpp:611
#45 0x00007f53eec1b81d in QUnixEventDispatcherQPA::processEvents (this=<optimized out>, flags=...) at eventdispatchers/qunixeventdispatcher.cpp:62
#46 0x00007f5403a10392 in QEventLoop::exec (this=this@entry=0x7fff53642440, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#47 0x00007f5403a17fdc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1185
#48 0x00007f5403d5719c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1535
#49 0x00007f5404316f55 in QApplication::exec () at kernel/qapplication.cpp:2956
#50 0x00007f54054e0a79 in kdemain (argc=3, argv=0x7fff53642678) at ../main_x11.cpp:297
#51 0x00007f5405138ec5 in __libc_start_main (main=0x4007d0 <main(int, char**)>, argc=3, argv=0x7fff53642678, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff53642668) at libc-start.c:287
#52 0x00000000004007fe in _start ()

Reported using DrKonqi