Application: systemsettings5 (5.4.1)

Qt Version: 5.4.1
Operating System: Linux 3.19.0-28-generic x86_64
Distribution: Ubuntu 15.04

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

I was switching between Composer and Screen (monitor) settings.

-- 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 0x7f8944a90780 (LWP 9131))]

Thread 3 (Thread 0x7f8932284700 (LWP 9132)):
#0  0x00007f89411ec8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f893f707b72 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f893f70964f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f893503f099 in QXcbEventReader::run (this=0x1f80f30) at qxcbconnection.cpp:1105
#4  0x00007f894186db0e in QThreadPrivate::start (arg=0x1f80f30) at thread/qthread_unix.cpp:337
#5  0x00007f893e6256aa in start_thread (arg=0x7f8932284700) at pthread_create.c:333
#6  0x00007f89411f7eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f8920605700 (LWP 9150)):
#0  0x00007f89411ec8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f893e106ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f893e107242 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f892119caf6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f893e12d955 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f893e6256aa in start_thread (arg=0x7f8920605700) at pthread_create.c:333
#6  0x00007f89411f7eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f8944a90780 (LWP 9131)):
[KCrash Handler]
#6  0x00007f89402f5d6b in QQuickItemPrivate::addToDirtyList() () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f89402f5e28 in QQuickItemPrivate::dirty(QQuickItemPrivate::DirtyType) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007f8940300045 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007f8941add73a in QObject::event (this=0x290c240, e=<optimized out>) at kernel/qobject.cpp:1245
#10 0x00007f89402feb6b in QQuickItem::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007f894289cb2c in QApplicationPrivate::notify_helper (this=0x1f52580, receiver=0x290c240, e=0x7f8908158e50) at kernel/qapplication.cpp:3720
#12 0x00007f89428a2000 in QApplication::notify (this=0x7ffc23880420, receiver=0x290c240, e=0x7f8908158e50) at kernel/qapplication.cpp:3503
#13 0x00007f8941aabc2b in QCoreApplication::notifyInternal (this=0x7ffc23880420, receiver=0x290c240, event=event@entry=0x7f8908158e50) at kernel/qcoreapplication.cpp:935
#14 0x00007f8941aadc9b in sendEvent (event=0x7f8908158e50, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#15 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x1f517a0) at kernel/qcoreapplication.cpp:1552
#16 0x00007f8941aae298 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1410
#17 0x00007f8941b04843 in postEventSourceDispatch (s=0x1fcb610) at kernel/qeventdispatcher_glib.cpp:271
#18 0x00007f893e106c3d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007f893e106f20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f893e106fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007f8941b04c57 in QEventDispatcherGlib::processEvents (this=0x1fdc250, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#22 0x00007f8941aa93e2 in QEventLoop::exec (this=this@entry=0x7ffc23880300, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#23 0x00007f8941ab102c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#24 0x00007f89422d731c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1510
#25 0x00007f89428987a5 in QApplication::exec () at kernel/qapplication.cpp:2956
#26 0x000000000040f04b in main (argc=1, argv=<optimized out>) at ../../app/main.cpp:55

Possible duplicates by query: bug 352402, bug 352354, bug 352084, bug 352082, bug 351907.

Reported using DrKonqi