Application: plasmashell (5.5.5)

Qt Version: 5.5.1
Operating System: Linux 4.4.0-36-generic x86_64
Distribution: Ubuntu 16.04.1 LTS

-- Information about the crash:
- What I was doing when the application crashed:
Logging in after turning on the machine, desktop had not yet appeared
- Unusual behavior I noticed:
It took a long time to log in and then Plasma crashed (before loading the desktop)

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
[Current thread is 1 (Thread 0x7f6f6a82b8c0 (LWP 4668))]

Thread 7 (Thread 0x7f6f391b0700 (LWP 4684)):
[KCrash Handler]
#6  __strstr_sse2_unaligned () at ../sysdeps/x86_64/multiarch/strstr-sse2-unaligned.S:40
#7  0x00007f6f688a9aca in strstr (__needle=0x7f6f68a46fdf "nouveau", __haystack=<optimized out>) at /usr/include/string.h:332
#8  QSGRenderContext::initialize (this=0x2465790, context=<optimized out>) at scenegraph/qsgcontext.cpp:659
#9  0x00007f6f688cd409 in QSGRenderThread::run (this=0x24bc0f0) at scenegraph/qsgthreadedrenderloop.cpp:676
#10 0x00007f6f6562d84e in QThreadPrivate::start (arg=0x24bc0f0) at thread/qthread_unix.cpp:331
#11 0x00007f6f6471a6fa in start_thread (arg=0x7f6f391b0700) at pthread_create.c:333
#12 0x00007f6f64f43b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f6f3bdf7700 (LWP 4681)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f6f6a275bd4 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f6f6a275c19 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f6f6471a6fa in start_thread (arg=0x7f6f3bdf7700) at pthread_create.c:333
#4  0x00007f6f64f43b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f6f4190f700 (LWP 4680)):
#0  0x00007ffe7e5ed9a9 in ?? ()
#1  0x00007ffe7e5edcd5 in clock_gettime ()
#2  0x00007f6f64f51fb6 in __GI___clock_gettime (clock_id=1, tp=tp@entry=0x7f6f4190ea50) at ../sysdeps/unix/clock_gettime.c:115
#3  0x00007f6f656ddc16 in qt_clock_gettime (ts=0x7f6f4190ea50, clock=<optimized out>) at tools/qelapsedtimer_unix.cpp:105
#4  do_gettime (frac=<synthetic pointer>, sec=<synthetic pointer>) at tools/qelapsedtimer_unix.cpp:156
#5  qt_gettime () at tools/qelapsedtimer_unix.cpp:165
#6  0x00007f6f65862529 in QTimerInfoList::updateCurrentTime (this=this@entry=0x7f6f34002ed0) at kernel/qtimerinfo_unix.cpp:84
#7  0x00007f6f65862a95 in QTimerInfoList::timerWait (this=0x7f6f34002ed0, tm=...) at kernel/qtimerinfo_unix.cpp:381
#8  0x00007f6f65863e7e in timerSourcePrepareHelper (timeout=0x7f6f4190eb24, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:127
#9  timerSourcePrepare (source=<optimized out>, timeout=0x7f6f4190eb24) at kernel/qeventdispatcher_glib.cpp:160
#10 0x00007f6f61ccc92d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007f6f61ccd2cb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007f6f61ccd4ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#13 0x00007f6f65864a9b in QEventDispatcherGlib::processEvents (this=0x7f6f340008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#14 0x00007f6f6580bdea in QEventLoop::exec (this=this@entry=0x7f6f4190ece0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#15 0x00007f6f656288a4 in QThread::exec (this=this@entry=0x232aba0) at thread/qthread.cpp:503
#16 0x00007f6f67ed03c5 in QQmlThreadPrivate::run (this=0x232aba0) at qml/ftw/qqmlthread.cpp:141
#17 0x00007f6f6562d84e in QThreadPrivate::start (arg=0x232aba0) at thread/qthread_unix.cpp:331
#18 0x00007f6f6471a6fa in start_thread (arg=0x7f6f4190f700) at pthread_create.c:333
#19 0x00007f6f64f43b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f6f436c2700 (LWP 4679)):
#0  0x00007f6f61d11ae4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f6f61ccc9b0 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6f61ccd2cb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6f61ccd4ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6f65864a9b in QEventDispatcherGlib::processEvents (this=0x7f6f3c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f6f6580bdea in QEventLoop::exec (this=this@entry=0x7f6f436c1ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f6f656288a4 in QThread::exec (this=this@entry=0x213f230) at thread/qthread.cpp:503
#7  0x00007f6f67ed03c5 in QQmlThreadPrivate::run (this=0x213f230) at qml/ftw/qqmlthread.cpp:141
#8  0x00007f6f6562d84e in QThreadPrivate::start (arg=0x213f230) at thread/qthread_unix.cpp:331
#9  0x00007f6f6471a6fa in start_thread (arg=0x7f6f436c2700) at pthread_create.c:333
#10 0x00007f6f64f43b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f6f4fdfa700 (LWP 4675)):
#0  0x00007f6f64f339cd in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f6f61d10740 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6f61ccce84 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6f61ccd340 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6f61ccd4ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f6f65864a9b in QEventDispatcherGlib::processEvents (this=0x7f6f480008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#6  0x00007f6f6580bdea in QEventLoop::exec (this=this@entry=0x7f6f4fdf9ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#7  0x00007f6f656288a4 in QThread::exec (this=this@entry=0x1e7e210) at thread/qthread.cpp:503
#8  0x00007f6f67ed03c5 in QQmlThreadPrivate::run (this=0x1e7e210) at qml/ftw/qqmlthread.cpp:141
#9  0x00007f6f6562d84e in QThreadPrivate::start (arg=0x1e7e210) at thread/qthread_unix.cpp:331
#10 0x00007f6f6471a6fa in start_thread (arg=0x7f6f4fdfa700) at pthread_create.c:333
#11 0x00007f6f64f43b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f6f56a85700 (LWP 4672)):
#0  0x00007f6f64f37e8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f6f68ffcc62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f6f68ffe8d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f6f59205629 in QXcbEventReader::run (this=0x1da72e0) at qxcbconnection.cpp:1253
#4  0x00007f6f6562d84e in QThreadPrivate::start (arg=0x1da72e0) at thread/qthread_unix.cpp:331
#5  0x00007f6f6471a6fa in start_thread (arg=0x7f6f56a85700) at pthread_create.c:333
#6  0x00007f6f64f43b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f6f6a82b8c0 (LWP 4668)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f6f6562eaeb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x2472df0) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x24bc130, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007f6f688c9bc6 in QSGThreadedRenderLoop::polishAndSync (this=this@entry=0x1fd8ee0, w=<optimized out>, w@entry=0x25f7490, inExpose=inExpose@entry=true) at scenegraph/qsgthreadedrenderloop.cpp:1150
#4  0x00007f6f688cc09c in QSGThreadedRenderLoop::handleExposure (this=this@entry=0x1fd8ee0, window=window@entry=0x2467fc0) at scenegraph/qsgthreadedrenderloop.cpp:946
#5  0x00007f6f688cc733 in QSGThreadedRenderLoop::exposureChanged (this=0x1fd8ee0, window=0x2467fc0) at scenegraph/qsgthreadedrenderloop.cpp:857
#6  0x00007f6f65b592f5 in QWindow::event (this=this@entry=0x2467fc0, ev=ev@entry=0x7ffe7e5c1600) at kernel/qwindow.cpp:2060
#7  0x00007f6f688ff871 in QQuickWindow::event (this=this@entry=0x2467fc0, e=e@entry=0x7ffe7e5c1600) at items/qquickwindow.cpp:1413
#8  0x000000000043f206 in DesktopView::event (this=0x2467fc0, e=0x7ffe7e5c1600) at /build/plasma-workspace-kxRFE_/plasma-workspace-5.5.5.2/shell/desktopview.cpp:205
#9  0x00007f6f6631105c in QApplicationPrivate::notify_helper (this=this@entry=0x1d8d380, receiver=receiver@entry=0x2467fc0, e=e@entry=0x7ffe7e5c1600) at kernel/qapplication.cpp:3716
#10 0x00007f6f66316516 in QApplication::notify (this=0x7ffe7e5c1a20, receiver=0x2467fc0, e=0x7ffe7e5c1600) at kernel/qapplication.cpp:3499
#11 0x00007f6f6580e62b in QCoreApplication::notifyInternal (this=0x7ffe7e5c1a20, receiver=receiver@entry=0x2467fc0, event=event@entry=0x7ffe7e5c1600) at kernel/qcoreapplication.cpp:965
#12 0x00007f6f65b514ec in QCoreApplication::sendSpontaneousEvent (event=0x7ffe7e5c1600, receiver=0x2467fc0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:227
#13 QGuiApplicationPrivate::processExposeEvent (e=0x24b9c00) at kernel/qguiapplication.cpp:2663
#14 0x00007f6f65b5225d in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x24b9c00) at kernel/qguiapplication.cpp:1658
#15 0x00007f6f65b35f38 in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:625
#16 0x00007f6f59237070 in userEventSourceDispatch (source=<optimized out>) at eventdispatchers/qeventdispatcher_glib.cpp:70
#17 0x00007f6f61ccd1a7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#18 0x00007f6f61ccd400 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007f6f61ccd4ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f6f65864a7f in QEventDispatcherGlib::processEvents (this=0x1dce4b0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#21 0x00007f6f6580bdea in QEventLoop::exec (this=this@entry=0x7ffe7e5c18c0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#22 0x00007f6f65813e8c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#23 0x00007f6f65b47c3c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1542
#24 0x00007f6f6630d495 in QApplication::exec () at kernel/qapplication.cpp:2976
#25 0x0000000000432d4a in main (argc=4, argv=<optimized out>) at /build/plasma-workspace-kxRFE_/plasma-workspace-5.5.5.2/shell/main.cpp:181

Possible duplicates by query: bug 366041, bug 364203, bug 363884, bug 363388, bug 363386.

Reported using DrKonqi