Bug 416991

Application: systemsettings5 (5.17.5)

Qt Version: 5.13.2
Frameworks Version: 5.66.0
Operating System: Linux 5.4.14-200.fc31.x86_64 x86_64
Distribution: Fedora 31 (Workstation Edition)

-- Information about the crash:
- What I was doing when the application crashed:

While docking my laptop (T450s) a good percentage of the time the screen's aren't returned to their previous positions. In this case one was not showing any video. System Settings->Display and Monitor->Display Config, and the screens were randomly placed. When this happens I usually disable the two screens, click outside the tab then back in (because frequently disabling the screens results in it completely disappearing), and then re-enable and re-position them. In this case it crashed when I clicked "input devices" IIRC.

It could be a dupe of one of the other tab switching ones, but I couldn't compare the backtrace with this app easily.

-- Backtrace:
Application: System Settings (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f891057e800 (LWP 2686))]

Thread 11 (Thread 0x7f88e1b7d700 (LWP 2725)):
#0  0x00007f89132c207a in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f8914a877e9 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () from /lib64/libQt5Core.so.5
#2  0x00007f8914a8790b in QWaitCondition::wait(QMutex*, unsigned long) () from /lib64/libQt5Core.so.5
#3  0x00007f8914a85623 in QThreadPoolThread::run() () from /lib64/libQt5Core.so.5
#4  0x00007f8914a81d96 in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#5  0x00007f89132bb4e2 in start_thread () from /lib64/libpthread.so.0
#6  0x00007f89146ff6d3 in clone () from /lib64/libc.so.6

Thread 10 (Thread 0x7f88e3fff700 (LWP 2724)):
#0  0x00007f89132c207a in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f8914a877e9 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () from /lib64/libQt5Core.so.5
#2  0x00007f8914a8790b in QWaitCondition::wait(QMutex*, unsigned long) () from /lib64/libQt5Core.so.5
#3  0x00007f8914a85623 in QThreadPoolThread::run() () from /lib64/libQt5Core.so.5
#4  0x00007f8914a81d96 in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#5  0x00007f89132bb4e2 in start_thread () from /lib64/libpthread.so.0
#6  0x00007f89146ff6d3 in clone () from /lib64/libc.so.6

Thread 9 (Thread 0x7f88e137c700 (LWP 2723)):
#0  0x00007f89132c207a in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f8914a877e9 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () from /lib64/libQt5Core.so.5
#2  0x00007f8914a8790b in QWaitCondition::wait(QMutex*, unsigned long) () from /lib64/libQt5Core.so.5
#3  0x00007f8914a85623 in QThreadPoolThread::run() () from /lib64/libQt5Core.so.5
#4  0x00007f8914a81d96 in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#5  0x00007f89132bb4e2 in start_thread () from /lib64/libpthread.so.0
#6  0x00007f89146ff6d3 in clone () from /lib64/libc.so.6

Thread 8 (Thread 0x7f88ed85a700 (LWP 2722)):
#0  0x00007f89132c207a in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f8914a877e9 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () from /lib64/libQt5Core.so.5
#2  0x00007f8914a8790b in QWaitCondition::wait(QMutex*, unsigned long) () from /lib64/libQt5Core.so.5
#3  0x00007f8914a85623 in QThreadPoolThread::run() () from /lib64/libQt5Core.so.5
#4  0x00007f8914a81d96 in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#5  0x00007f89132bb4e2 in start_thread () from /lib64/libpthread.so.0
#6  0x00007f89146ff6d3 in clone () from /lib64/libc.so.6

Thread 7 (Thread 0x7f88e2dbe700 (LWP 2721)):
#0  0x00007f89146f4a6f in poll () from /lib64/libc.so.6
#1  0x00007f88ec185196 in poll_func () from /lib64/libpulse.so.0
#2  0x00007f88ec176801 in pa_mainloop_poll () from /lib64/libpulse.so.0
#3  0x00007f88ec176e83 in pa_mainloop_iterate () from /lib64/libpulse.so.0
#4  0x00007f88ec176f30 in pa_mainloop_run () from /lib64/libpulse.so.0
#5  0x00007f88ec1850dd in thread () from /lib64/libpulse.so.0
#6  0x00007f88ec120b9c in internal_thread_func () from /usr/lib64/pulseaudio/libpulsecommon-13.0.so
#7  0x00007f89132bb4e2 in start_thread () from /lib64/libpthread.so.0
#8  0x00007f89146ff6d3 in clone () from /lib64/libc.so.6

Thread 6 (Thread 0x7f88effff700 (LWP 2693)):
#0  0x00007f89129b3a4d in g_mutex_lock () from /lib64/libglib-2.0.so.0
#1  0x00007f8912966894 in g_main_context_acquire () from /lib64/libglib-2.0.so.0
#2  0x00007f89129676c5 in g_main_context_iterate.isra () from /lib64/libglib-2.0.so.0
#3  0x00007f8912967943 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#4  0x00007f8914c86843 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#5  0x00007f8914c301db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#6  0x00007f8914a80c45 in QThread::exec() () from /lib64/libQt5Core.so.5
#7  0x00007f8913d2f399 in QQmlThreadPrivate::run() () from /lib64/libQt5Qml.so.5
#8  0x00007f8914a81d96 in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#9  0x00007f89132bb4e2 in start_thread () from /lib64/libpthread.so.0
#10 0x00007f89146ff6d3 in clone () from /lib64/libc.so.6

Thread 5 (Thread 0x7f88fa4af700 (LWP 2692)):
#0  0x00007f89146f4a6f in poll () from /lib64/libc.so.6
#1  0x00007f891296780e in g_main_context_iterate.isra () from /lib64/libglib-2.0.so.0
#2  0x00007f8912967943 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#3  0x00007f8914c86843 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#4  0x00007f8914c301db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#5  0x00007f8914a80c45 in QThread::exec() () from /lib64/libQt5Core.so.5
#6  0x00007f8913d2f399 in QQmlThreadPrivate::run() () from /lib64/libQt5Qml.so.5
#7  0x00007f8914a81d96 in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#8  0x00007f89132bb4e2 in start_thread () from /lib64/libpthread.so.0
#9  0x00007f89146ff6d3 in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7f88fb2ed700 (LWP 2690)):
#0  0x00007f89132c1d45 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f88fb7db19b in util_queue_thread_func () from /usr/lib64/dri/i965_dri.so
#2  0x00007f88fb7dadab in impl_thrd_routine () from /usr/lib64/dri/i965_dri.so
#3  0x00007f89132bb4e2 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f89146ff6d3 in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7f890227f700 (LWP 2689)):
#0  0x00007f89129b3a78 in g_mutex_unlock () from /lib64/libglib-2.0.so.0
#1  0x00007f8912967261 in g_main_context_check () from /lib64/libglib-2.0.so.0
#2  0x00007f89129677b2 in g_main_context_iterate.isra () from /lib64/libglib-2.0.so.0
#3  0x00007f8912967943 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#4  0x00007f8914c86843 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#5  0x00007f8914c301db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#6  0x00007f8914a80c45 in QThread::exec() () from /lib64/libQt5Core.so.5
#7  0x00007f8914f0cf6a in QDBusConnectionManager::run() () from /lib64/libQt5DBus.so.5
#8  0x00007f8914a81d96 in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#9  0x00007f89132bb4e2 in start_thread () from /lib64/libpthread.so.0
#10 0x00007f89146ff6d3 in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f8903252700 (LWP 2688)):
#0  0x00007f89146f4a6f in poll () from /lib64/libc.so.6
#1  0x00007f891327a38a in _xcb_conn_wait () from /lib64/libxcb.so.1
#2  0x00007f891327bfea in xcb_wait_for_event () from /lib64/libxcb.so.1
#3  0x00007f8903454d48 in QXcbEventQueue::run() () from /lib64/libQt5XcbQpa.so.5
#4  0x00007f8914a81d96 in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#5  0x00007f89132bb4e2 in start_thread () from /lib64/libpthread.so.0
#6  0x00007f89146ff6d3 in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f891057e800 (LWP 2686)):
[KCrash Handler]
#6  0x00007f89141038a9 in QQuickWindow::mouseGrabberItem() const () from /lib64/libQt5Quick.so.5
#7  0x00007f891410627e in QQuickWindowPrivate::removeGrabber(QQuickItem*, bool, bool) () from /lib64/libQt5Quick.so.5
#8  0x00007f89140f1143 in QQuickItemPrivate::derefWindow() () from /lib64/libQt5Quick.so.5
#9  0x00007f89140f3346 in QQuickItem::~QQuickItem() () from /lib64/libQt5Quick.so.5
#10 0x00007f89141158e2 in QQmlPrivate::QQmlElement<QQuickRectangle>::~QQmlElement() () from /lib64/libQt5Quick.so.5
#11 0x00007f8914c5c5c4 in QObject::event(QEvent*) () from /lib64/libQt5Core.so.5
#12 0x00007f89140f0253 in QQuickItem::event(QEvent*) () from /lib64/libQt5Quick.so.5
#13 0x00007f8915641ab6 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib64/libQt5Widgets.so.5
#14 0x00007f891564b150 in QApplication::notify(QObject*, QEvent*) () from /lib64/libQt5Widgets.so.5
#15 0x00007f8914c313e8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib64/libQt5Core.so.5
#16 0x00007f8914c3442b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /lib64/libQt5Core.so.5
#17 0x00007f8914c86a97 in postEventSourceDispatch(_GSource*, int (*)(void*), void*) () from /lib64/libQt5Core.so.5
#18 0x00007f8912967510 in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#19 0x00007f89129678a0 in g_main_context_iterate.isra () from /lib64/libglib-2.0.so.0
#20 0x00007f8912967943 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#21 0x00007f8914c86825 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#22 0x00007f8914c301db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#23 0x00007f8914c380b6 in QCoreApplication::exec() () from /lib64/libQt5Core.so.5
#24 0x0000561a67f4786e in main ()
[Inferior 1 (process 2686) detached]

Possible duplicates by query: bug 413698, bug 412367, bug 397807, bug 397772, bug 397547.

Reported using DrKonqi