Application: plasmashell (5.3.0)

Qt Version: 5.4.1
Operating System: Linux 4.0.4-303.fc22.x86_64 x86_64
Distribution: "Fedora release 22 (Twenty Two)"

-- Information about the crash:
just wait for the system ok, it crash just before opening desktop, and after it fix all by itself

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7ff888676900 (LWP 2366))]

Thread 5 (Thread 0x7ff8691da700 (LWP 2368)):
#0  0x00007ff88055166d in poll () at /lib64/libc.so.6
#1  0x00007ff886941182 in _xcb_conn_wait () at /lib64/libxcb.so.1
#2  0x00007ff886942d07 in xcb_wait_for_event () at /lib64/libxcb.so.1
#3  0x00007ff86ad225e9 in QXcbEventReader::run() () at /usr/lib64/qt5/plugins/platforms/libqxcb.so
#4  0x00007ff88115bede in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#5  0x00007ff87eff2555 in start_thread () at /lib64/libpthread.so.0
#6  0x00007ff88055cf3d in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7ff862b7c700 (LWP 2440)):
#0  0x00007ff88054d2ed in read () at /lib64/libc.so.6
#1  0x00007ff87b74bb00 in g_wakeup_acknowledge () at /lib64/libglib-2.0.so.0
#2  0x00007ff87b7078b4 in g_main_context_check () at /lib64/libglib-2.0.so.0
#3  0x00007ff87b707d60 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#4  0x00007ff87b707ecc in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#5  0x00007ff88139275b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007ff881338a8a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#7  0x00007ff881156ff4 in QThread::exec() () at /lib64/libQt5Core.so.5
#8  0x00007ff8853de935 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#9  0x00007ff88115bede in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#10 0x00007ff87eff2555 in start_thread () at /lib64/libpthread.so.0
#11 0x00007ff88055cf3d in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7ff85967a700 (LWP 2475)):
#0  0x00007ff87eff7530 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007ff86060ec4a in radeon_drm_cs_emit_ioctl () at /usr/lib64/dri/r600_dri.so
#2  0x00007ff86060e4b7 in impl_thrd_routine () at /usr/lib64/dri/r600_dri.so
#3  0x00007ff87eff2555 in start_thread () at /lib64/libpthread.so.0
#4  0x00007ff88055cf3d in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7ff857390700 (LWP 2480)):
#0  0x00007ff88055166d in poll () at /lib64/libc.so.6
#1  0x00007ff87b707dbc in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007ff87b707ecc in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007ff88139275b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007ff881338a8a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007ff881156ff4 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007ff8853de935 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007ff88115bede in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007ff87eff2555 in start_thread () at /lib64/libpthread.so.0
#9  0x00007ff88055cf3d in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7ff888676900 (LWP 2366)):
[KCrash Handler]
#5  0x00007ff887724185 in QtPrivate::QFunctorSlotObject<void DBusFuture::continueWith<QString, KActivities::Manager::serviceOwnerChanged(QString const&, QString const&, QString const&)::{lambda(QString const&)#3}>(QFuture<QString> const&, KActivities::Manager::serviceOwnerChanged(QString const&, QString const&, QString const&)::{lambda(QString const&)#3}&&)::{lambda()#1}, 0, QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*) () at /lib64/libKF5Activities.so.5
#6  0x00007ff88136cb11 in QObject::event(QEvent*) () at /lib64/libQt5Core.so.5
#7  0x00007ff8828cc7cc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#8  0x00007ff8828d1e70 in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#9  0x00007ff88133b24b in QCoreApplication::notifyInternal(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#10 0x00007ff88133d387 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /lib64/libQt5Core.so.5
#11 0x00007ff881392333 in postEventSourceDispatch(_GSource*, int (*)(void*), void*) () at /lib64/libQt5Core.so.5
#12 0x00007ff87b707a8a in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#13 0x00007ff87b707e20 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#14 0x00007ff87b707ecc in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#15 0x00007ff88139273f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#16 0x00007ff881338a8a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#17 0x00007ff8813405fc in QCoreApplication::exec() () at /lib64/libQt5Core.so.5
#18 0x000000000042eb0f in main ()

Possible duplicates by query: bug 348289.

Reported using DrKonqi