Application: kwin_x11 (5.2.2)

Qt Version: 5.4.1
Operating System: Linux 3.19.0-22-generic x86_64
Distribution: Ubuntu 15.04

-- Information about the crash:
Launched kde
at abouit 80% background back to login screen., kde running no window borders

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f4e74af9800 (LWP 8996))]

Thread 4 (Thread 0x7f4e501ea700 (LWP 9008)):
#0  0x00007f4e745d349d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f4e6ad9773c in ?? () from /usr/lib/nvidia-304/libGL.so.1
#2  0x00007f4e66733bf7 in ?? () from /usr/lib/nvidia-304/tls/libnvidia-tls.so.304.125
#3  0x00007f4e6b7302f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4e6b6ec96c in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f4e6b6ece60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f4e6b6ed242 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f4e571f1af6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#8  0x00007f4e6b713955 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007f4e6ad98754 in ?? () from /usr/lib/nvidia-304/libGL.so.1
#10 0x00007f4e6bc0b6aa in start_thread (arg=0x7f4e501ea700) at pthread_create.c:333
#11 0x00007f4e745e2eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f4e4f9e9700 (LWP 9009)):
#0  0x00007f4e6b6ec4f5 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f4e6b6ecde8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4e6b6ecfcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4e6b6ed009 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4e6b713955 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f4e6ad98754 in ?? () from /usr/lib/nvidia-304/libGL.so.1
#6  0x00007f4e6bc0b6aa in start_thread (arg=0x7f4e4f9e9700) at pthread_create.c:333
#7  0x00007f4e745e2eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f4e4dbc4700 (LWP 9021)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1  0x00007f4e72b91ba8 in wait_relative (time=30000, this=0x115c920) at thread/qwaitcondition_unix.cpp:118
#2  wait (time=30000, this=0x115c920) at thread/qwaitcondition_unix.cpp:126
#3  QWaitCondition::wait (this=this@entry=0x1158620, mutex=mutex@entry=0x115c6c0, time=30000) at thread/qwaitcondition_unix.cpp:200
#4  0x00007f4e72b8dc54 in QThreadPoolThread::run (this=0x1158610) at thread/qthreadpool.cpp:127
#5  0x00007f4e72b90b0e in QThreadPrivate::start (arg=0x1158610) at thread/qthread_unix.cpp:337
#6  0x00007f4e6ad98754 in ?? () from /usr/lib/nvidia-304/libGL.so.1
#7  0x00007f4e6bc0b6aa in start_thread (arg=0x7f4e4dbc4700) at pthread_create.c:333
#8  0x00007f4e745e2eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f4e74af9800 (LWP 8996)):
[KCrash Handler]
#6  xcb_setup_vendor_end (R=R@entry=0x0) at xproto.c:1569
#7  0x00007f4e728dc059 in xcb_setup_pixmap_formats_iterator (R=R@entry=0x0) at xproto.c:1622
#8  0x00007f4e728dc099 in xcb_setup_roots_iterator (R=0x0) at xproto.c:1659
#9  0x00007f4e740fc0f8 in defaultScreen () at ../libkwineffects/kwinglobals.h:170
#10 KWin::ColorMapper::ColorMapper (this=this@entry=0x1165740, parent=parent@entry=0x115c130) at ../workspace.cpp:82
#11 0x00007f4e74104371 in KWin::Workspace::Workspace (this=0x115c130, restore=<optimized out>) at ../workspace.cpp:172
#12 0x00007f4e748a9aa6 in operator() (__closure=<synthetic pointer>) at ../main_x11.cpp:170
#13 call (arg=<optimized out>, f=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:494
#14 call<QtPrivate::List<>, void> (arg=<optimized out>, f=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:551
#15 QtPrivate::QFunctorSlotObject<KWin::ApplicationX11::performStartup()::<lambda()>, 0, QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase *, QObject *, void **, bool *) (which=<optimized out>, this_=<optimized out>, r=<optimized out>, a=<optimized out>, ret=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobject_impl.h:192
#16 0x00007f4e72dff35a in call (a=0x7ffd1f723fe0, r=0x1147a60, this=0x1146b30) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#17 QMetaObject::activate (sender=0x1147a60, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x0) at kernel/qobject.cpp:3702
#18 0x00007f4e72e00057 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7f4e73e74bc0 <KSelectionOwner::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x0) at kernel/qobject.cpp:3582
#19 0x00007f4e73c640e3 in KSelectionOwner::claimedOwnership (this=<optimized out>) at moc_kselectionowner.cpp:150
#20 0x00007f4e73c47a9b in KSelectionOwner::Private::claimSucceeded (this=0x1146fa0) at ../../src/kselectionowner.cpp:206
#21 0x00007f4e73c48221 in KSelectionOwner::filterEvent (this=0x1147a60, ev_P=<optimized out>) at ../../src/kselectionowner.cpp:424
#22 0x00007f4e72dcb510 in QAbstractEventDispatcher::filterNativeEvent (this=this@entry=0x1029d20, eventType=..., message=message@entry=0x7f4e58001c60, result=result@entry=0x7ffd1f724178) at kernel/qabstracteventdispatcher.cpp:460
#23 0x00007f4e5e5a902d in QXcbConnection::handleXcbEvent (this=this@entry=0xf429f0, event=event@entry=0x7f4e58001c60) at qxcbconnection.cpp:863
#24 0x00007f4e5e5aa4bb in QXcbConnection::processXcbEvents (this=0xf429f0) at qxcbconnection.cpp:1303
#25 0x00007f4e72e0073a in QObject::event (this=0xf429f0, e=<optimized out>) at kernel/qobject.cpp:1245
#26 0x00007f4e736d8b2c in QApplicationPrivate::notify_helper (this=0xf34180, receiver=0xf429f0, e=0x7f4e58001360) at kernel/qapplication.cpp:3720
#27 0x00007f4e736de000 in QApplication::notify (this=0x7ffd1f724860, receiver=0xf429f0, e=0x7f4e58001360) at kernel/qapplication.cpp:3503
#28 0x00007f4e72dcec2b in QCoreApplication::notifyInternal (this=0x7ffd1f724860, receiver=0xf429f0, event=event@entry=0x7f4e58001360) at kernel/qcoreapplication.cpp:935
#29 0x00007f4e72dd0c9b in sendEvent (event=0x7f4e58001360, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#30 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0xf25010) at kernel/qcoreapplication.cpp:1552
#31 0x00007f4e72e25112 in QEventDispatcherUNIX::processEvents (this=0x1029d20, flags=flags@entry=...) at kernel/qeventdispatcher_unix.cpp:579
#32 0x00007f4e5e60096d in QUnixEventDispatcherQPA::processEvents (this=<optimized out>, flags=...) at eventdispatchers/qunixeventdispatcher.cpp:62
#33 0x00007f4e72dcc3e2 in QEventLoop::exec (this=this@entry=0x7ffd1f724780, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#34 0x00007f4e72dd402c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#35 0x00007f4e7311331c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1510
#36 0x00007f4e736d47a5 in QApplication::exec () at kernel/qapplication.cpp:2956
#37 0x00007f4e748aa8c3 in kdemain (argc=3, argv=0x7ffd1f7249b8) at ../main_x11.cpp:294
#38 0x00007f4e744fca40 in __libc_start_main (main=0x400790 <main(int, char**)>, argc=3, argv=0x7ffd1f7249b8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd1f7249a8) at libc-start.c:289
#39 0x00000000004007c9 in _start ()

Reported using DrKonqi