Bug 351926

Application: systemsettings5 (5.2.2)

Qt Version: 5.4.1
Operating System: Linux 3.19.0-26-generic x86_64
Distribution: Ubuntu 15.04

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

I was changing compositor settings: drawing engine and suspend composition in fullscreen application. I am using nvidia driver 352.30.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Ustawienia systemowe (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f519c67b780 (LWP 1809))]

Thread 2 (Thread 0x7f5189fe5700 (LWP 1810)):
#0  0x00007f5198ddd8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f51970f7b72 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f51970f964f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f518cd78099 in QXcbEventReader::run (this=0x235fed0) at qxcbconnection.cpp:1105
#4  0x00007f519945eb0e in QThreadPrivate::start (arg=0x235fed0) at thread/qthread_unix.cpp:337
#5  0x00007f51960116aa in start_thread (arg=0x7f5189fe5700) at pthread_create.c:333
#6  0x00007f5198de8eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f519c67b780 (LWP 1809)):
[KCrash Handler]
#6  0x00007f5197efade4 in QQuickWindow::maybeUpdate() () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f5197ee6e28 in QQuickItemPrivate::dirty(QQuickItemPrivate::DirtyType) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007f5197ef1045 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007f51996ce73a in QObject::event (this=0x2d21790, e=<optimized out>) at kernel/qobject.cpp:1245
#10 0x00007f5197eefb6b in QQuickItem::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007f519a488b2c in QApplicationPrivate::notify_helper (this=0x23329a0, receiver=0x2d21790, e=0x7f5174084600) at kernel/qapplication.cpp:3720
#12 0x00007f519a48e000 in QApplication::notify (this=0x7ffd7036df10, receiver=0x2d21790, e=0x7f5174084600) at kernel/qapplication.cpp:3503
#13 0x00007f519969cc2b in QCoreApplication::notifyInternal (this=0x7ffd7036df10, receiver=0x2d21790, event=event@entry=0x7f5174084600) at kernel/qcoreapplication.cpp:935
#14 0x00007f519969ec9b in sendEvent (event=0x7f5174084600, 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=0x2331bc0) at kernel/qcoreapplication.cpp:1552
#16 0x00007f519969f298 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1410
#17 0x00007f51996f5843 in postEventSourceDispatch (s=0x239ed70) at kernel/qeventdispatcher_glib.cpp:271
#18 0x00007f5195af2c3d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007f5195af2f20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f5195af2fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007f51996f5c57 in QEventDispatcherGlib::processEvents (this=0x23a6540, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#22 0x00007f519969a3e2 in QEventLoop::exec (this=this@entry=0x7ffd7036ddf0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#23 0x00007f51996a202c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#24 0x00007f5199ec331c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1510
#25 0x00007f519a4847a5 in QApplication::exec () at kernel/qapplication.cpp:2956
#26 0x000000000040eebc in main (argc=1, argv=<optimized out>) at ../../app/main.cpp:54

Reported using DrKonqi