Bug 344151

Application: systemsettings5 (5.2.0)

Qt Version: 5.3.2
Operating System: Linux 3.18.0-13-generic x86_64
Distribution: Ubuntu Vivid Vervet (development branch)

-- Information about the crash:
- What I was doing when the application crashed:
Exited monitors and screens configuration module

- Unusual behavior I noticed:
Probably not related, but currently my system fails to start a login screen manager (sddm); so starting the desktop through a tty with startx.

-- Backtrace:
Application: System Settings (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f94854ad7c0 (LWP 6014))]

Thread 2 (Thread 0x7f9472a8f700 (LWP 6015)):
#0  0x00007f948125e0fd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f947fb5ab72 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f947fb5c64f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f947581ee39 in QXcbEventReader::run (this=0xb80740) at qxcbconnection.cpp:1046
#4  0x00007f94818ded2e in QThreadPrivate::start (arg=0xb80740) at thread/qthread_unix.cpp:345
#5  0x00007f947e3c80a5 in start_thread (arg=0x7f9472a8f700) at pthread_create.c:309
#6  0x00007f94812685ad in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f94854ad7c0 (LWP 6014)):
[KCrash Handler]
#6  0x00007f9460ec6a04 in QQuickWindow::maybeUpdate() () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f9460eb35c8 in QQuickItemPrivate::dirty(QQuickItemPrivate::DirtyType) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007f9460ebc5e5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007f9481b4c0aa in QObject::event (this=0x1330a00, e=<optimized out>) at kernel/qobject.cpp:1241
#10 0x00007f9460ebb67b in QQuickItem::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007f9482f5d1ec in QApplicationPrivate::notify_helper (this=0xb52f90, receiver=0x1330a00, e=0x7f94544c4450) at kernel/qapplication.cpp:3499
#12 0x00007f9482f626c0 in QApplication::notify (this=0x7fff0b5b3430, receiver=0x1330a00, e=0x7f94544c4450) at kernel/qapplication.cpp:3282
#13 0x00007f9481b1bf9b in QCoreApplication::notifyInternal (this=0x7fff0b5b3430, receiver=0x1330a00, event=event@entry=0x7f94544c4450) at kernel/qcoreapplication.cpp:935
#14 0x00007f9481b1df93 in sendEvent (event=0x7f94544c4450, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:237
#15 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0xb526f0) at kernel/qcoreapplication.cpp:1539
#16 0x00007f9481b1e598 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1397
#17 0x00007f9481b73f73 in postEventSourceDispatch (s=0xbca220) at kernel/qeventdispatcher_glib.cpp:279
#18 0x00007f947dea8ecd in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007f947dea91b0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f947dea925c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007f9481b74387 in QEventDispatcherGlib::processEvents (this=0xbc5a60, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#22 0x00007f9481b196e2 in QEventLoop::exec (this=this@entry=0x7fff0b5b3310, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#23 0x00007f9481b2132c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#24 0x00007f94827c474c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1486
#25 0x00007f9482f5b7f5 in QApplication::exec () at kernel/qapplication.cpp:2744
#26 0x000000000040e96c in main (argc=1, argv=<optimized out>) at ../../app/main.cpp:54

Reported using DrKonqi