Application: plasmashell (5.4.2)

Qt Version: 5.4.2
Operating System: Linux 4.2.0-30-generic x86_64
Distribution: Ubuntu 15.10

-- Information about the crash:
- What I was doing when the application crashed:
Plasmashell and kdeinit5 (no error reporting option) frequently crashing resulting black screen and I have to restart KDE session. commonly I notice this when system has been idle for a while, but frequently happens when browsing net with firefox. Usually I have Thunderbird, firefox and one console window open on desktop. all installed from Ubuntu repository.
This crashing happens frequently several times a day.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Plasma (plasmashell), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fb8262b4800 (LWP 13979))]

Thread 12 (Thread 0x7fb80fe15700 (LWP 13985)):
#0  0x00007fb820a6388d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fb824aaabd2 in poll (__timeout=-1, __nfds=1, __fds=0x7fb80fe14cc0) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#2  _xcb_conn_wait (c=c@entry=0x1baa480, cond=cond@entry=0x1baa4c0, vector=vector@entry=0x0, count=count@entry=0x0) at ../../src/xcb_conn.c:459
#3  0x00007fb824aac74f in xcb_wait_for_event (c=0x1baa480) at ../../src/xcb_in.c:623
#4  0x00007fb8129d6a39 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
#5  0x00007fb8211562be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb8202456aa in start_thread (arg=0x7fb80fe15700) at pthread_create.c:333
#7  0x00007fb820a6ee9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7fb80d61d700 (LWP 13999)):
#0  0x00007fb820a6388d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fb81d8101ec in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb81d8102fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb82138d29b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb82133375a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb8211513d4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb823979f85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fb8211562be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb8202456aa in start_thread (arg=0x7fb80d61d700) at pthread_create.c:333
#9  0x00007fb820a6ee9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7fb7feb7b700 (LWP 14000)):
#0  0x00007fb81d80f784 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb81d81011b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb81d8102fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb82138d29b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb82133375a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb8211513d4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb823979f85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fb8211562be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb8202456aa in start_thread (arg=0x7fb7feb7b700) at pthread_create.c:333
#9  0x00007fb820a6ee9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7fb7f7fff700 (LWP 14004)):
#0  0x00007fb81d80fbda in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb81d810190 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb81d8102fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb82138d29b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb82133375a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb8211513d4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb823979f85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fb8211562be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb8202456aa in start_thread (arg=0x7fb7f7fff700) at pthread_create.c:333
#9  0x00007fb820a6ee9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7fb7f6997700 (LWP 14007)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb825d05114 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007fb825d05159 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007fb8202456aa in start_thread (arg=0x7fb7f6997700) at pthread_create.c:333
#4  0x00007fb820a6ee9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7fb76bdf9700 (LWP 14012)):
#0  0x00007ffe4a076c4f in clock_gettime ()
#1  0x00007fb820a7d33d in __GI___clock_gettime (clock_id=<optimized out>, tp=<optimized out>) at ../sysdeps/unix/clock_gettime.c:115
#2  0x00007fb8212073a6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007fb82138ad29 in QTimerInfoList::updateCurrentTime() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb82138b295 in QTimerInfoList::timerWait(timespec&) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb82138c67e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb81d80f77d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007fb81d81011b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007fb81d8102fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007fb82138d29b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fb82133375a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007fb8211513d4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007fb8242f5ef6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#13 0x00007fb8211562be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007fb8202456aa in start_thread (arg=0x7fb76bdf9700) at pthread_create.c:333
#15 0x00007fb820a6ee9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7fb76a624700 (LWP 14013)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb82115755b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb824368b3e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#3  0x00007fb8243693c3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007fb8211562be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb8202456aa in start_thread (arg=0x7fb76a624700) at pthread_create.c:333
#6  0x00007fb820a6ee9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7fb754dd3700 (LWP 14018)):
#0  0x00007fb820a6388d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fb81d8101ec in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb81d8102fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb82138d29b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb82133375a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb8211513d4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb75706a8f7 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007fb8211562be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb8202456aa in start_thread (arg=0x7fb754dd3700) at pthread_create.c:333
#9  0x00007fb820a6ee9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fb74fdf9700 (LWP 14028)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb82115755b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb824368b3e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#3  0x00007fb8243693c3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007fb8211562be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb8202456aa in start_thread (arg=0x7fb74fdf9700) at pthread_create.c:333
#6  0x00007fb820a6ee9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fb744daf700 (LWP 14037)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb82115755b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb824368b3e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#3  0x00007fb8243693c3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007fb8211562be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb8202456aa in start_thread (arg=0x7fb744daf700) at pthread_create.c:333
#6  0x00007fb820a6ee9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fb73ffff700 (LWP 14054)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb82115755b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb824368b3e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#3  0x00007fb8243693c3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007fb8211562be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb8202456aa in start_thread (arg=0x7fb73ffff700) at pthread_create.c:333
#6  0x00007fb820a6ee9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fb8262b4800 (LWP 13979)):
[KCrash Handler]
#6  0x00007fb82099d267 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:55
#7  0x00007fb82099eeca in __GI_abort () at abort.c:89
#8  0x00007fb821143c88 in QMessageLogger::fatal(char const*, ...) const () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fb8264174e2 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#10 0x00007fb8213781e8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007fb8213786ef in QVariant::QVariant(int, void const*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007fb8213428df in QMetaProperty::read(QObject const*) const () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007fb82136532f in QObject::property(char const*) const () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007fb82592d054 in Solid::Backends::UDisks2::DeviceBackend::checkCache (this=0x37603a0, key=...) at ../../../src/solid/devices/backends/udisks2/udisksdevicebackend.cpp:185
#15 0x00007fb82592d273 in Solid::Backends::UDisks2::DeviceBackend::propertyExists (this=0x37603a0, key=...) at ../../../src/solid/devices/backends/udisks2/udisksdevicebackend.cpp:132
#16 0x00007fb825924e6e in Solid::Backends::UDisks2::Device::propertyExists (this=this@entry=0x360ff40, key=...) at ../../../src/solid/devices/backends/udisks2/udisksdevice.cpp:126
#17 0x00007fb825926c2f in Solid::Backends::UDisks2::Device::isMounted (this=0x360ff40) at ../../../src/solid/devices/backends/udisks2/udisksdevice.cpp:818
#18 0x00007fb825940371 in Solid::Backends::UDisks2::StorageAccess::isAccessible (this=0x7ffe4a02b080) at ../../../src/solid/devices/backends/udisks2/udisksstorageaccess.cpp:75
#19 0x00007fb8259405a4 in Solid::Backends::UDisks2::StorageAccess::updateCache (this=0x7ffe4a02b080) at ../../../src/solid/devices/backends/udisks2/udisksstorageaccess.cpp:138
#20 Solid::Backends::UDisks2::StorageAccess::StorageAccess (this=0x7ffe4a02b080, device=0x360ff40, __in_chrg=<optimized out>, __vtt_parm=<optimized out>) at ../../../src/solid/devices/backends/udisks2/udisksstorageaccess.cpp:36
#21 0x00007fb8259271f6 in Solid::Backends::UDisks2::Device::emblems (this=0x360ff40) at ../../../src/solid/devices/backends/udisks2/udisksdevice.cpp:221
#22 0x00007fb8258ed85d in Solid::Device::emblems (this=this@entry=0x7ffe4a02b250) at ../../../src/solid/devices/frontend/device.cpp:121
#23 0x00007fb760b653fe in HotplugEngine::onDeviceAdded (this=this@entry=0x2a61680, device=..., added=added@entry=true) at ../../../dataengines/hotplug/hotplugengine.cpp:235
#24 0x00007fb760b66b81 in HotplugEngine::onDeviceAdded (this=0x2a61680, udi=...) at ../../../dataengines/hotplug/hotplugengine.cpp:181
#25 0x00007fb82136678a in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007fb8258ee792 in Solid::DeviceNotifier::deviceAdded (this=<optimized out>, _t1=...) at ./moc_devicenotifier.cpp:135
#27 0x00007fb82136678a in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007fb82594ae12 in Solid::Ifaces::DeviceManager::deviceAdded (this=this@entry=0x2ad0650, _t1=...) at moc_devicemanager.cpp:135
#29 0x00007fb82591d601 in Solid::Backends::UDisks2::Manager::slotInterfacesAdded (this=0x2ad0650, object_path=..., interfaces_and_properties=...) at ../../../src/solid/devices/backends/udisks2/udisksmanager.cpp:197
#30 0x00007fb82594ef2d in Solid::Backends::UDisks2::Manager::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at moc_udisksmanager.cpp:86
#31 0x00007fb82136678a in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#32 0x00007fb82594f23f in OrgFreedesktopDBusObjectManagerInterface::InterfacesAdded (_t2=..., _t1=..., this=0x2ad0668) at moc_manager.cpp:173
#33 OrgFreedesktopDBusObjectManagerInterface::qt_static_metacall (_o=_o@entry=0x2ad0668, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=_id@entry=0, _a=_a@entry=0x7ffe4a02b910) at moc_manager.cpp:89
#34 0x00007fb825953a45 in OrgFreedesktopDBusObjectManagerInterface::qt_metacall (this=0x2ad0668, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0x7ffe4a02b910) at moc_manager.cpp:159
#35 0x00007fb8263f3d4e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#36 0x00007fb821367651 in QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#37 0x00007fb821e13b8c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#38 0x00007fb821e19230 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#39 0x00007fb821335f1b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#40 0x00007fb821338057 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#41 0x00007fb82138ce73 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#42 0x00007fb81d80fff7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#43 0x00007fb81d810250 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#44 0x00007fb81d8102fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#45 0x00007fb82138d27f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#46 0x00007fb82133375a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#47 0x00007fb82133b2cc in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#48 0x00000000004322c3 in main (argc=4, argv=<optimized out>) at ../../shell/main.cpp:176

Possible duplicates by query: bug 359689, bug 359602, bug 358869, bug 358762, bug 356148.

Reported using DrKonqi