Bug 373064

Application: plasmashell (5.7.5)

Qt Version: 5.6.1
Frameworks Version: 5.26.0
Operating System: Linux 4.8.0-26-generic x86_64
Distribution: Ubuntu Zesty Zapus (development branch)

-- Information about the crash:
- What I was doing when the application crashed:
Running the live cd under fusion 8.5.2. Splash screen comes up, then blank screen most of the time. Several retries got me to running with the plasma crash this time

- Unusual behavior I noticed:
Black screen after splash screen ends

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 0x7fd9f66caec0 (LWP 2000))]

Thread 7 (Thread 0x7fd92cefc700 (LWP 2187)):
#0  __libc_enable_asynccancel () at ../sysdeps/unix/sysv/linux/x86_64/cancellation.S:67
#1  0x00007fd9f0f55c82 in read () at ../sysdeps/unix/syscall-template.S:84
#2  0x00007fd9edcddc80 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd9edc994fe in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd9edc999d4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fd9edc99b4c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fd9f18884bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fd9f183010a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fd9f1655d43 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fd92f4165c7 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#10 0x00007fd9f165ac68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007fd9f073a70a in start_thread (arg=0x7fd92cefc700) at pthread_create.c:333
#12 0x00007fd9f0f660af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 6 (Thread 0x7fd93e1d0700 (LWP 2176)):
#0  0x00007fd9edcdf044 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd9edc99431 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd9edc999d4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd9edc99b4c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd9f18884bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fd9f183010a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fd9f1655d43 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fd9f48e0706 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007fd9f165ac68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fd9f073a70a in start_thread (arg=0x7fd93e1d0700) at pthread_create.c:333
#10 0x00007fd9f0f660af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 5 (Thread 0x7fd94f707700 (LWP 2145)):
#0  0x00007fd9edcdf044 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fd9edc98f10 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd9edc9995b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd9edc99b4c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd9f18884bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fd9f183010a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fd9f1655d43 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fd9f3f58c65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fd9f165ac68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fd9f073a70a in start_thread (arg=0x7fd94f707700) at pthread_create.c:333
#10 0x00007fd9f0f660af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 4 (Thread 0x7fd9d88fc700 (LWP 2060)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fd9f6120574 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007fd9f61205b9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007fd9f073a70a in start_thread (arg=0x7fd9d88fc700) at pthread_create.c:333
#4  0x00007fd9f0f660af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 3 (Thread 0x7fd9da3e3700 (LWP 2046)):
#0  0x00007fd9f0f55c8d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fd9edcddc80 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd9edc994fe in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd9edc999d4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fd9edc99b4c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fd9f18884bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fd9f183010a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fd9f1655d43 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fd9f3f58c65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007fd9f165ac68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fd9f073a70a in start_thread (arg=0x7fd9da3e3700) at pthread_create.c:333
#11 0x00007fd9f0f660af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 2 (Thread 0x7fd9e3d41700 (LWP 2020)):
#0  0x00007fd9f0f5a0bd in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fd9edc99a36 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fd9edc99b4c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fd9f18884bb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fd9f183010a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fd9f1655d43 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fd9f6807575 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007fd9f165ac68 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fd9f073a70a in start_thread (arg=0x7fd9e3d41700) at pthread_create.c:333
#9  0x00007fd9f0f660af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 1 (Thread 0x7fd9f66caec0 (LWP 2000)):
[KCrash Handler]
#6  0x00007fd9f4962d04 in QQuickItem::isEnabled() const () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fd9f497e6dc in QQuickWindowPrivate::setFocusInScope(QQuickItem*, QQuickItem*, Qt::FocusReason, QFlags<QQuickWindowPrivate::FocusOption>) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007fd9f4965398 in QQuickItem::setFocus(bool, Qt::FocusReason) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007fd9f49772b0 in QQuickWindow::focusInEvent(QFocusEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x00007fd9f1b91133 in QWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#11 0x00007fd9f4984a13 in QQuickWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#12 0x00005591025feae3 in ?? ()
#13 0x00007fd9f216d8ac in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007fd9f2172d4f in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007fd9f18323c0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007fd9f1b86b69 in QGuiApplicationPrivate::processActivatedEvent(QWindowSystemInterfacePrivate::ActivatedWindowEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#17 0x00007fd9f1b86eed in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#18 0x00007fd9f1b64b2b in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#19 0x00007fd9e31b7660 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#20 0x00007fd9edc99837 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007fd9edc99aa0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007fd9edc99b4c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007fd9f188849f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007fd9f183010a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007fd9f183891c in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00005591025f0f1f in ?? ()
#27 0x00007fd9f0e7e3f1 in __libc_start_main (main=0x5591025f03b0, argc=2, argv=0x7ffc455350b8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc455350a8) at ../csu/libc-start.c:291
#28 0x00005591025f129a in _start ()

Possible duplicates by query: bug 373049, bug 372773, bug 372490, bug 372397, bug 372396.

Reported using DrKonqi