Bug 366837

Application: plasmashell (5.5.5)

Qt Version: 5.5.1
Operating System: Linux 4.4.0-34-generic x86_64
Distribution: Ubuntu 16.04.1 LTS

-- Information about the crash:
- What I was doing when the application crashed
booting the computer. OK until log-in. Plasma crashes with every user
- Unusual behavior I noticed:
no log in possible

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".
pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
[Current thread is 1 (Thread 0x7fb61f2b18c0 (LWP 4642))]

Thread 16 (Thread 0x7fb559b4c700 (LWP 4712)):
[KCrash Handler]
#6  __strstr_sse2 (haystack_start=0x0, needle_start=0x7fb61d49ffdf "nouveau") at ../string/strstr.c:63
#7  0x00007fb61d302aca in strstr (__needle=0x7fb61d49ffdf "nouveau", __haystack=<optimized out>) at /usr/include/string.h:332
#8  QSGRenderContext::initialize (this=0xe86970, context=<optimized out>) at scenegraph/qsgcontext.cpp:659
#9  0x00007fb61d326409 in QSGRenderThread::run (this=0xd6c5e0) at scenegraph/qsgthreadedrenderloop.cpp:676
#10 0x00007fb61a05484e in QThreadPrivate::start (arg=0xd6c5e0) at thread/qthread_unix.cpp:331
#11 0x00007fb6191266fa in start_thread (arg=0x7fb559b4c700) at pthread_create.c:333
#12 0x00007fb61995db5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 15 (Thread 0x7fb55b716700 (LWP 4709)):
#0  0x00007fb6166bdac9 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb616678474 in g_main_context_release () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb616679356 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb6166794ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb61a28ba9b in QEventDispatcherGlib::processEvents (this=0x7fb5500008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007fb61a232dea in QEventLoop::exec (this=this@entry=0x7fb55b715c90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fb61a04f8a4 in QThread::exec (this=this@entry=0x1720bc0) at thread/qthread.cpp:503
#7  0x00007fb61d2afed6 in QQuickPixmapReader::run (this=0x1720bc0) at util/qquickpixmapcache.cpp:817
#8  0x00007fb61a05484e in QThreadPrivate::start (arg=0x1720bc0) at thread/qthread_unix.cpp:331
#9  0x00007fb6191266fa in start_thread (arg=0x7fb55b716700) at pthread_create.c:333
#10 0x00007fb61995db5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 14 (Thread 0x7fb561415700 (LWP 4708)):
#0  0x00007fff7e3219a9 in ?? ()
#1  0x00007fff7e321cd5 in clock_gettime ()
#2  0x00007fb61996bfb6 in __GI___clock_gettime (clock_id=1, tp=tp@entry=0x7fb561414a70) at ../sysdeps/unix/clock_gettime.c:115
#3  0x00007fb61a104c16 in qt_clock_gettime (ts=0x7fb561414a70, 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  0x00007fb61a289529 in QTimerInfoList::updateCurrentTime (this=this@entry=0x7fb554002cd0) at kernel/qtimerinfo_unix.cpp:84
#7  0x00007fb61a289a95 in QTimerInfoList::timerWait (this=0x7fb554002cd0, tm=...) at kernel/qtimerinfo_unix.cpp:381
#8  0x00007fb61a28ae7e in timerSourcePrepareHelper (timeout=0x7fb561414b44, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:127
#9  timerSourcePrepare (source=<optimized out>, timeout=0x7fb561414b44) at kernel/qeventdispatcher_glib.cpp:160
#10 0x00007fb61667892d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007fb6166792cb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007fb6166794ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#13 0x00007fb61a28ba9b in QEventDispatcherGlib::processEvents (this=0x7fb5540008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#14 0x00007fb61a232dea in QEventLoop::exec (this=this@entry=0x7fb561414d00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#15 0x00007fb61a04f8a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#16 0x00007fb61a05484e in QThreadPrivate::start (arg=0xb79280) at thread/qthread_unix.cpp:331
#17 0x00007fb6191266fa in start_thread (arg=0x7fb561415700) at pthread_create.c:333
#18 0x00007fb61995db5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 13 (Thread 0x7fb561c16700 (LWP 4707)):
#0  0x00007fb6166bdae4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb6166794b6 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb61a28ba9b in QEventDispatcherGlib::processEvents (this=0x7fb55c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#3  0x00007fb61a232dea in QEventLoop::exec (this=this@entry=0x7fb561c15ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#4  0x00007fb61a04f8a4 in QThread::exec (this=this@entry=0x1517d40) at thread/qthread.cpp:503
#5  0x00007fb5e801c035 in QQuickXmlQueryEngine::run (this=0x1517d40) at qqmlxmllistmodel.cpp:317
#6  0x00007fb61a05484e in QThreadPrivate::start (arg=0x1517d40) at thread/qthread_unix.cpp:331
#7  0x00007fb6191266fa in start_thread (arg=0x7fb561c16700) at pthread_create.c:333
#8  0x00007fb61995db5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 12 (Thread 0x7fb5ea7b6700 (LWP 4695)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb61ecf3bd4 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007fb61ecf3c19 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007fb6191266fa in start_thread (arg=0x7fb5ea7b6700) at pthread_create.c:333
#4  0x00007fb61995db5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7fb5ebfff700 (LWP 4683)):
#0  0x00007fb619951e8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fb61667939c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb6166794ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb61a28ba9b in QEventDispatcherGlib::processEvents (this=0x7fb5e40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fb61a232dea in QEventLoop::exec (this=this@entry=0x7fb5ebffece0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fb61a04f8a4 in QThread::exec (this=this@entry=0xc89940) at thread/qthread.cpp:503
#6  0x00007fb61c9183c5 in QQmlThreadPrivate::run (this=0xc89940) at qml/ftw/qqmlthread.cpp:141
#7  0x00007fb61a05484e in QThreadPrivate::start (arg=0xc89940) at thread/qthread_unix.cpp:331
#8  0x00007fb6191266fa in start_thread (arg=0x7fb5ebfff700) at pthread_create.c:333
#9  0x00007fb61995db5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7fb5f20c6700 (LWP 4682)):
#0  0x00007fb6166bdae4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb616678c09 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb616679317 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb6166794ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb61a28ba9b in QEventDispatcherGlib::processEvents (this=0x7fb5ec0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007fb61a232dea in QEventLoop::exec (this=this@entry=0x7fb5f20c5ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fb61a04f8a4 in QThread::exec (this=this@entry=0xbe9f40) at thread/qthread.cpp:503
#7  0x00007fb61c9183c5 in QQmlThreadPrivate::run (this=0xbe9f40) at qml/ftw/qqmlthread.cpp:141
#8  0x00007fb61a05484e in QThreadPrivate::start (arg=0xbe9f40) at thread/qthread_unix.cpp:331
#9  0x00007fb6191266fa in start_thread (arg=0x7fb5f20c6700) at pthread_create.c:333
#10 0x00007fb61995db5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7fb5fbefe700 (LWP 4667)):
#0  0x00007fb6166bdae4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb616678c09 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb616679317 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb6166794ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb61a28ba9b in QEventDispatcherGlib::processEvents (this=0x7fb5f40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007fb61a232dea in QEventLoop::exec (this=this@entry=0x7fb5fbefdce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fb61a04f8a4 in QThread::exec (this=this@entry=0x9e3c60) at thread/qthread.cpp:503
#7  0x00007fb61c9183c5 in QQmlThreadPrivate::run (this=0x9e3c60) at qml/ftw/qqmlthread.cpp:141
#8  0x00007fb61a05484e in QThreadPrivate::start (arg=0x9e3c60) at thread/qthread_unix.cpp:331
#9  0x00007fb6191266fa in start_thread (arg=0x7fb5fbefe700) at pthread_create.c:333
#10 0x00007fb61995db5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7fb5fe589700 (LWP 4663)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb608da5aa3 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#2  0x00007fb608da5907 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#3  0x00007fb6191266fa in start_thread (arg=0x7fb5fe589700) at pthread_create.c:333
#4  0x00007fb61995db5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7fb5fed8a700 (LWP 4662)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb608da5aa3 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#2  0x00007fb608da5907 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#3  0x00007fb6191266fa in start_thread (arg=0x7fb5fed8a700) at pthread_create.c:333
#4  0x00007fb61995db5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7fb5ff58b700 (LWP 4661)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb608da5aa3 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#2  0x00007fb608da5907 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#3  0x00007fb6191266fa in start_thread (arg=0x7fb5ff58b700) at pthread_create.c:333
#4  0x00007fb61995db5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7fb5ffd8c700 (LWP 4660)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb608da5aa3 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#2  0x00007fb608da5907 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#3  0x00007fb6191266fa in start_thread (arg=0x7fb5ffd8c700) at pthread_create.c:333
#4  0x00007fb61995db5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fb60058d700 (LWP 4659)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb608da5aa3 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#2  0x00007fb608da5907 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#3  0x00007fb6191266fa in start_thread (arg=0x7fb60058d700) at pthread_create.c:333
#4  0x00007fb61995db5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fb600d8e700 (LWP 4658)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb608da5aa3 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#2  0x00007fb608da5907 in ?? () from /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
#3  0x00007fb6191266fa in start_thread (arg=0x7fb600d8e700) at pthread_create.c:333
#4  0x00007fb61995db5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fb60b756700 (LWP 4650)):
#0  0x00007fb619951e8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fb61da60c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fb61da628d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fb60df10629 in QXcbEventReader::run (this=0x8d2000) at qxcbconnection.cpp:1253
#4  0x00007fb61a05484e in QThreadPrivate::start (arg=0x8d2000) at thread/qthread_unix.cpp:331
#5  0x00007fb6191266fa in start_thread (arg=0x7fb60b756700) at pthread_create.c:333
#6  0x00007fb61995db5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fb61f2b18c0 (LWP 4642)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb61a055aeb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0xb7e940) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0xd6c620, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007fb61d322bc6 in QSGThreadedRenderLoop::polishAndSync (this=this@entry=0xb66cd0, w=<optimized out>, w@entry=0xf3cba0, inExpose=inExpose@entry=true) at scenegraph/qsgthreadedrenderloop.cpp:1150
#4  0x00007fb61d32509c in QSGThreadedRenderLoop::handleExposure (this=this@entry=0xb66cd0, window=window@entry=0xe95c00) at scenegraph/qsgthreadedrenderloop.cpp:946
#5  0x00007fb61d325733 in QSGThreadedRenderLoop::exposureChanged (this=0xb66cd0, window=0xe95c00) at scenegraph/qsgthreadedrenderloop.cpp:857
#6  0x00007fb61a5822f5 in QWindow::event (this=this@entry=0xe95c00, ev=ev@entry=0x7fff7e2fdaa0) at kernel/qwindow.cpp:2060
#7  0x00007fb61d358871 in QQuickWindow::event (this=this@entry=0xe95c00, e=e@entry=0x7fff7e2fdaa0) at items/qquickwindow.cpp:1413
#8  0x000000000043f206 in DesktopView::event (this=0xe95c00, e=0x7fff7e2fdaa0) at /build/plasma-workspace-kxRFE_/plasma-workspace-5.5.5.2/shell/desktopview.cpp:205
#9  0x00007fb61ad3a05c in QApplicationPrivate::notify_helper (this=this@entry=0x8baba0, receiver=receiver@entry=0xe95c00, e=e@entry=0x7fff7e2fdaa0) at kernel/qapplication.cpp:3716
#10 0x00007fb61ad3f516 in QApplication::notify (this=0x7fff7e2fdec0, receiver=0xe95c00, e=0x7fff7e2fdaa0) at kernel/qapplication.cpp:3499
#11 0x00007fb61a23562b in QCoreApplication::notifyInternal (this=0x7fff7e2fdec0, receiver=receiver@entry=0xe95c00, event=event@entry=0x7fff7e2fdaa0) at kernel/qcoreapplication.cpp:965
#12 0x00007fb61a57a4ec in QCoreApplication::sendSpontaneousEvent (event=0x7fff7e2fdaa0, receiver=0xe95c00) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:227
#13 QGuiApplicationPrivate::processExposeEvent (e=0xef3610) at kernel/qguiapplication.cpp:2663
#14 0x00007fb61a57b25d in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0xef3610) at kernel/qguiapplication.cpp:1658
#15 0x00007fb61a55ef38 in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:625
#16 0x00007fb60df42070 in userEventSourceDispatch (source=<optimized out>) at eventdispatchers/qeventdispatcher_glib.cpp:70
#17 0x00007fb6166791a7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#18 0x00007fb616679400 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007fb6166794ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007fb61a28ba7f in QEventDispatcherGlib::processEvents (this=0x931fc0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#21 0x00007fb61a232dea in QEventLoop::exec (this=this@entry=0x7fff7e2fdd60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#22 0x00007fb61a23ae8c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#23 0x00007fb61a570c3c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1542
#24 0x00007fb61ad36495 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 365068, bug 364380, bug 364203, bug 363884.

Reported using DrKonqi