Application: kwin_x11 (5.2.1)

Qt Version: 5.4.0
Operating System: Linux 3.19.0-7-generic x86_64
Distribution: Ubuntu Vivid Vervet (development branch)

-- Information about the crash:
- What I was doing when the application crashed:
I suspend while attached to external monitor. Then I detach the monitor, and wake the computer from suspend. Now the window area is active in the size of the external monitor, while the rest of the laptop screen looks strange.

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 0x7f5dd49dd840 (LWP 2872))]

Thread 3 (Thread 0x7f5db6bab700 (LWP 2924)):
#0  0x00007f5dd44a8ef3 in select () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f5dd2cfffa1 in qt_safe_select (nfds=14, fdread=fdread@entry=0x7f5dac000a78, fdwrite=fdwrite@entry=0x7f5dac000d08, fdexcept=fdexcept@entry=0x7f5dac000f98, orig_timeout=orig_timeout@entry=0x0) at kernel/qcore_unix.cpp:75
#2  0x00007f5dd2d01b5c in select (timeout=0x0, exceptfds=0x7f5dac000f98, writefds=0x7f5dac000d08, readfds=0x7f5dac000a78, nfds=<optimized out>, this=0x7f5dac0008c0) at kernel/qeventdispatcher_unix.cpp:320
#3  QEventDispatcherUNIXPrivate::doSelect (this=this@entry=0x7f5dac0008e0, flags=..., flags@entry=..., timeout=timeout@entry=0x0) at kernel/qeventdispatcher_unix.cpp:196
#4  0x00007f5dd2d020d5 in QEventDispatcherUNIX::processEvents (this=0x7f5dac0008c0, flags=...) at kernel/qeventdispatcher_unix.cpp:607
#5  0x00007f5dd2ca9392 in QEventLoop::exec (this=this@entry=0x7f5db6baad60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f5dd2a68a94 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f5dcc917865 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f5dd2a6da4e in QThreadPrivate::start (arg=0x1f3ed80) at thread/qthread_unix.cpp:337
#9  0x00007f5dcbae00a5 in start_thread (arg=0x7f5db6bab700) at pthread_create.c:309
#10 0x00007f5dd44b157d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7f5db4854700 (LWP 2935)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5dd1876684 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f5dd18766c9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f5dcbae00a5 in start_thread (arg=0x7f5db4854700) at pthread_create.c:309
#4  0x00007f5dd44b157d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f5dd49dd840 (LWP 2872)):
[KCrash Handler]
#6  QScreen::handle (this=0x0) at kernel/qscreen.cpp:85
#7  0x00007f5dbf4f68f5 in QXcbWindow::QXcbWindow (this=0x326b000, window=0x22499a0) at qxcbwindow.cpp:244
#8  0x00007f5dbf4e45e1 in QXcbIntegration::createPlatformWindow (this=<optimized out>, window=0x22499a0) at qxcbintegration.cpp:175
#9  0x00007f5dd2ffd4f6 in QWindowPrivate::create (this=0x224a110, recursive=recursive@entry=false) at kernel/qwindow.cpp:395
#10 0x00007f5dd2ffd6eb in QWindow::create (this=this@entry=0x22499a0) at kernel/qwindow.cpp:530
#11 0x00007f5dd2ffd898 in QWindow::winId (this=0x22499a0) at kernel/qwindow.cpp:549
#12 0x00007f5dd4097dff in KWin::AbstractThumbnailItem::findParentEffectWindow (this=0x325e390) at ../thumbnailitem.cpp:79
#13 0x00007f5dd4097fc9 in KWin::AbstractThumbnailItem::effectWindowAdded (this=0x325e390) at ../thumbnailitem.cpp:90
#14 0x00007f5dd4122285 in KWin::AbstractThumbnailItem::qt_static_metacall (_o=0x0, _c=3564590968, _id=52952512, _a=0x7f5dd4775760 <main_arena>) at moc_thumbnailitem.cpp:130
#15 0x00007f5dd2cdc959 in QMetaObject::activate (sender=0x1f1a0c0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=5, argv=argv@entry=0x7ffff3ca8910) at kernel/qobject.cpp:3716
#16 0x00007f5dd2cdcfe7 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7f5dd249aac0 <KWin::EffectsHandler::staticMetaObject>, local_signal_index=local_signal_index@entry=5, argv=argv@entry=0x7ffff3ca8910) at kernel/qobject.cpp:3582
#17 0x00007f5dd228bfb2 in KWin::EffectsHandler::windowAdded (this=<optimized out>, _t1=0x31a3e00) at moc_kwineffects.cpp:1195
#18 0x00007f5dd2cdc2ea in call (a=0x7ffff3ca8a50, r=0x1f1a0c0, this=0x2c55590) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#19 QMetaObject::activate (sender=sender@entry=0x30c0540, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=7, argv=argv@entry=0x7ffff3ca8a50) at kernel/qobject.cpp:3702
#20 0x00007f5dd2cdcfe7 in QMetaObject::activate (sender=sender@entry=0x30c0540, m=m@entry=0x7f5dd43ab2e0 <KWin::Toplevel::staticMetaObject>, local_signal_index=local_signal_index@entry=7, argv=argv@entry=0x7ffff3ca8a50) at kernel/qobject.cpp:3582
#21 0x00007f5dd411d122 in KWin::Toplevel::windowShown (this=this@entry=0x30c0540, _t1=_t1@entry=0x30c0540) at moc_toplevel.cpp:656
#22 0x00007f5dd4063dff in KWin::Toplevel::setReadyForPainting (this=0x30c0540) at ../toplevel.cpp:245
#23 0x00007f5dd41230c5 in KWin::Toplevel::qt_static_metacall (_o=0x0, _c=3564590968, _id=52952512, _a=0x7f5dd4775760 <main_arena>) at moc_toplevel.cpp:327
#24 0x00007f5dd2cdc959 in QMetaObject::activate (sender=sender@entry=0x333dd10, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3716
#25 0x00007f5dd2cdcfe7 in QMetaObject::activate (sender=sender@entry=0x333dd10, m=m@entry=0x7f5dd2f03080 <QSingleShotTimer::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3582
#26 0x00007f5dd2cea63b in timeout (this=0x333dd10) at .moc/qtimer.moc:122
#27 QSingleShotTimer::timerEvent (this=0x333dd10) at kernel/qtimer.cpp:318
#28 0x00007f5dd2cdd683 in QObject::event (this=0x333dd10, e=<optimized out>) at kernel/qobject.cpp:1267
#29 0x00007f5dd35b42ec in QApplicationPrivate::notify_helper (this=0x1d3cd40, receiver=0x333dd10, e=0x7ffff3ca8ec0) at kernel/qapplication.cpp:3722
#30 0x00007f5dd35b9960 in QApplication::notify (this=0x7ffff3ca9100, receiver=0x333dd10, e=0x7ffff3ca8ec0) at kernel/qapplication.cpp:3505
#31 0x00007f5dd2cabbdb in QCoreApplication::notifyInternal (this=0x7ffff3ca9100, receiver=0x333dd10, event=event@entry=0x7ffff3ca8ec0) at kernel/qcoreapplication.cpp:932
#32 0x00007f5dd2d03945 in sendEvent (event=0x7ffff3ca8ec0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#33 QTimerInfoList::activateTimers (this=0x1d6f2a8) at kernel/qtimerinfo_unix.cpp:635
#34 0x00007f5dd2d01530 in QEventDispatcherUNIX::activateTimers (this=this@entry=0x1d6d4f0) at kernel/qeventdispatcher_unix.cpp:549
#35 0x00007f5dd2d020a3 in QEventDispatcherUNIX::processEvents (this=0x1d6d4f0, flags=flags@entry=...) at kernel/qeventdispatcher_unix.cpp:611
#36 0x00007f5dbf53889d in QUnixEventDispatcherQPA::processEvents (this=<optimized out>, flags=...) at eventdispatchers/qunixeventdispatcher.cpp:62
#37 0x00007f5dd2ca9392 in QEventLoop::exec (this=this@entry=0x7ffff3ca9020, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#38 0x00007f5dd2cb0fdc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1185
#39 0x00007f5dd2ff019c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1535
#40 0x00007f5dd35aff55 in QApplication::exec () at kernel/qapplication.cpp:2956
#41 0x00007f5dd47808c3 in kdemain (argc=1, argv=0x7ffff3ca9258) at ../main_x11.cpp:294
#42 0x00007f5dd43d8ec5 in __libc_start_main (main=0x400790 <main(int, char**)>, argc=3, argv=0x7ffff3ca9258, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffff3ca9248) at libc-start.c:287
#43 0x00000000004007be in _start ()

Reported using DrKonqi