Application: plasmashell (5.4.2)
 (Compiled from sources)
Qt Version: 5.4.2
Operating System: Linux 4.2.0-38-generic x86_64
Distribution: Ubuntu 15.10

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

When I was logining in ,with a Monitor linked with HDMI, and I was using my laptop, which has 6700hq and GTX960m (I don't know if the question is related with the drivers)

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fe644d14800 (LWP 1289))]

Thread 10 (Thread 0x7fe62e6e7700 (LWP 1293)):
#0  0x00007fe63f4b7b1d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fe6434febd2 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fe64350074f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fe63127ca39 in QXcbEventReader::run (this=0x24de790) at qxcbconnection.cpp:1105
#4  0x00007fe63fbaa2be in QThreadPrivate::start (arg=0x24de790) at thread/qthread_unix.cpp:337
#5  0x00007fe63ec996aa in start_thread (arg=0x7fe62e6e7700) at pthread_create.c:333
#6  0x00007fe63f4c313d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7fe627dfa700 (LWP 1321)):
#0  0x00007fe63c2a8884 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fe63c263770 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe63c26411b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe63c2642fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fe63fde129b in QEventDispatcherGlib::processEvents (this=0x7fe6200008e0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007fe63fd8775a in QEventLoop::exec (this=this@entry=0x7fe627df9da0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fe63fba53d4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fe6423cdf85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fe63fbaa2be in QThreadPrivate::start (arg=0x25ec950) at thread/qthread_unix.cpp:337
#9  0x00007fe63ec996aa in start_thread (arg=0x7fe627dfa700) at pthread_create.c:333
#10 0x00007fe63f4c313d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7fe61d355700 (LWP 1326)):
#0  0x00007fe63f4b7b1d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fe63c2641ec in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe63c2642fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe63fde129b in QEventDispatcherGlib::processEvents (this=0x7fe6180008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fe63fd8775a in QEventLoop::exec (this=this@entry=0x7fe61d354da0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fe63fba53d4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fe6423cdf85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fe63fbaa2be in QThreadPrivate::start (arg=0x29b91c0) at thread/qthread_unix.cpp:337
#8  0x00007fe63ec996aa in start_thread (arg=0x7fe61d355700) at pthread_create.c:333
#9  0x00007fe63f4c313d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7fe616b97700 (LWP 1351)):
#0  0x00007fe63f4b7b1d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fe63c2641ec in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe63c2642fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe63fde129b in QEventDispatcherGlib::processEvents (this=0x7fe6080008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fe63fd8775a in QEventLoop::exec (this=this@entry=0x7fe616b96da0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fe63fba53d4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fe6423cdf85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fe63fbaa2be in QThreadPrivate::start (arg=0x2b8a8f0) at thread/qthread_unix.cpp:337
#8  0x00007fe63ec996aa in start_thread (arg=0x7fe616b97700) at pthread_create.c:333
#9  0x00007fe63f4c313d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7fe6152b3700 (LWP 1355)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fe644759114 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007fe644759159 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007fe63ec996aa in start_thread (arg=0x7fe6152b3700) at pthread_create.c:333
#4  0x00007fe63f4c313d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7fe60e7fa700 (LWP 1375)):
#0  0x00007fe63f4b7b1d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fe63c2641ec in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe63c2642fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe63fde129b in QEventDispatcherGlib::processEvents (this=0x7fe5840008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fe63fd8775a in QEventLoop::exec (this=this@entry=0x7fe60e7f9d50, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fe63fba53d4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fe642d49ef6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fe63fbaa2be in QThreadPrivate::start (arg=0x2ec7110) at thread/qthread_unix.cpp:337
#8  0x00007fe63ec996aa in start_thread (arg=0x7fe60e7fa700) at pthread_create.c:333
#9  0x00007fe63f4c313d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fe60dff9700 (LWP 1393)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fe63fbab55b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x2e43930) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x2e4e860, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fe642dbcb3e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007fe642dbd3c3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007fe63fbaa2be in QThreadPrivate::start (arg=0x2e4e7e0) at thread/qthread_unix.cpp:337
#6  0x00007fe63ec996aa in start_thread (arg=0x7fe60dff9700) at pthread_create.c:333
#7  0x00007fe63f4c313d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fe5720dc700 (LWP 1500)):
#0  0x00007fe63c2639f7 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fe63c264167 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe63c2642fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe63fde129b in QEventDispatcherGlib::processEvents (this=0x7fe56c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fe63fd8775a in QEventLoop::exec (this=this@entry=0x7fe5720dbd80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fe63fba53d4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fe5743738f7 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007fe63fbaa2be in QThreadPrivate::start (arg=0x3586420) at thread/qthread_unix.cpp:337
#8  0x00007fe63ec996aa in start_thread (arg=0x7fe5720dc700) at pthread_create.c:333
#9  0x00007fe63f4c313d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fe570d78700 (LWP 1510)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fe63fbab55b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x316c2b0) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x37ba400, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fe642dbcb3e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007fe642dbd3c3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007fe63fbaa2be in QThreadPrivate::start (arg=0x37ba380) at thread/qthread_unix.cpp:337
#6  0x00007fe63ec996aa in start_thread (arg=0x7fe570d78700) at pthread_create.c:333
#7  0x00007fe63f4c313d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fe644d14800 (LWP 1289)):
[KCrash Handler]
#6  0x00007fe631277112 in QXcbClipboard::requestor (this=this@entry=0x24fbc90) at qxcbclipboard.cpp:481
#7  0x00007fe63127882f in QXcbClipboard::handleSelectionRequest (this=0x24fbc90, req=req@entry=0x7fe628006f30) at qxcbclipboard.cpp:610
#8  0x00007fe63127e711 in QXcbConnection::handleXcbEvent (this=this@entry=0x24d0ce0, event=event@entry=0x7fe628006f30) at qxcbconnection.cpp:922
#9  0x00007fe63127f3b3 in QXcbConnection::processXcbEvents (this=0x24d0ce0) at qxcbconnection.cpp:1303
#10 0x00007fe63fdbb651 in QObject::event (this=0x24d0ce0, e=<optimized out>) at kernel/qobject.cpp:1245
#11 0x00007fe640867b8c in QApplicationPrivate::notify_helper (this=this@entry=0x24b2c50, receiver=receiver@entry=0x24d0ce0, e=e@entry=0x7fe628009800) at kernel/qapplication.cpp:3720
#12 0x00007fe64086d230 in QApplication::notify (this=0x7fff1d2ec840, receiver=0x24d0ce0, e=0x7fe628009800) at kernel/qapplication.cpp:3503
#13 0x00007fe63fd89f1b in QCoreApplication::notifyInternal (this=0x7fff1d2ec840, receiver=0x24d0ce0, event=event@entry=0x7fe628009800) at kernel/qcoreapplication.cpp:935
#14 0x00007fe63fd8c057 in QCoreApplication::sendEvent (event=0x7fe628009800, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#15 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x24a81b0) at kernel/qcoreapplication.cpp:1552
#16 0x00007fe63fd8c588 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1410
#17 0x00007fe63fde0e73 in postEventSourceDispatch (s=0x250c290) at kernel/qeventdispatcher_glib.cpp:271
#18 0x00007fe63c263ff7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007fe63c264250 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007fe63c2642fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007fe63fde127f in QEventDispatcherGlib::processEvents (this=0x2505760, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#22 0x00007fe63fd8775a in QEventLoop::exec (this=this@entry=0x7fff1d2ec6c0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#23 0x00007fe63fd8f2cc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#24 0x00007fe6400a400c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1510
#25 0x00007fe640864025 in QApplication::exec () at kernel/qapplication.cpp:2956
#26 0x00000000004322c3 in main (argc=2, argv=<optimized out>) at ../../shell/main.cpp:176

Possible duplicates by query: bug 353438, bug 351022.

Reported using DrKonqi