Bug 348801

Application: systemsettings5 (5.2.2)

Qt Version: 5.4.1
Operating System: Linux 3.19.0-15-generic x86_64
Distribution: Ubuntu 15.04

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

Changing monitor resolutions and locations on my Thinkpad X1 Carbon 3rd Gen laptop. Monitor inputs were LCD, MiniDP, and HDMI.

-- 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 0x7ff496060780 (LWP 1892))]

Thread 3 (Thread 0x7ff4857d8700 (LWP 1893)):
#0  0x00007ff4927c38dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ff490addb72 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007ff490adf64f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007ff487d23099 in QXcbEventReader::run (this=0x1891630) at qxcbconnection.cpp:1105
#4  0x00007ff492e44b0e in QThreadPrivate::start (arg=0x1891630) at thread/qthread_unix.cpp:337
#5  0x00007ff48f9f76aa in start_thread (arg=0x7ff4857d8700) at pthread_create.c:333
#6  0x00007ff4927ceeed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7ff475bb2700 (LWP 2286)):
#0  0x00007ff4927c38dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ff48f4d8ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ff48f4d8fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ff4930dbc6c in QEventDispatcherGlib::processEvents (this=0x7ff4680e70b0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007ff4930803e2 in QEventLoop::exec (this=this@entry=0x7ff475bb1e20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007ff492e3fb44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007ff491e0af65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007ff492e44b0e in QThreadPrivate::start (arg=0x39ce430) at thread/qthread_unix.cpp:337
#8  0x00007ff48f9f76aa in start_thread (arg=0x7ff475bb2700) at pthread_create.c:333
#9  0x00007ff4927ceeed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7ff496060780 (LWP 1892)):
[KCrash Handler]
#6  0x00007ff4765ffdf4 in isEmpty (this=0x30) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qstring.h:791
#7  KScreen::ConfigOperation::hasError (this=this@entry=0x2317270) at ../../src/configoperation.cpp:76
#8  0x00007ff476600026 in KScreen::ConfigOperation::exec (this=0x2317270) at ../../src/configoperation.cpp:109
#9  0x00007ff47683333c in KCMKScreen::save (this=0x2317270) at ../../../kcm/src/kcm_kscreen.cpp:144
#10 0x00007ff495bd7077 in KCModuleProxy::save (this=<optimized out>) at ../../src/kcmoduleproxy.cpp:272
#11 0x00007ff495e07c13 in ModuleView::moduleSave (this=<optimized out>, module=<optimized out>) at ../../core/ModuleView.cpp:295
#12 0x00007ff495e0892e in ModuleView::moduleSave (this=<optimized out>) at ../../core/ModuleView.cpp:286
#13 0x00007ff495e0b585 in ModuleView::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=0x7ffd31d2d410) at moc_ModuleView.cpp:120
#14 0x00007ff4930b39c9 in QMetaObject::activate (sender=sender@entry=0x1a6d9c0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x7ffd31d2d410) at kernel/qobject.cpp:3716
#15 0x00007ff4930b4057 in QMetaObject::activate (sender=sender@entry=0x1a6d9c0, m=m@entry=0x7ff4943a8a60 <QAbstractButton::staticMetaObject>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x7ffd31d2d410) at kernel/qobject.cpp:3582
#16 0x00007ff49421d012 in QAbstractButton::clicked (this=this@entry=0x1a6d9c0, _t1=false) at .moc/moc_qabstractbutton.cpp:298
#17 0x00007ff493f6a675 in QAbstractButtonPrivate::emitClicked (this=0x21a8300) at widgets/qabstractbutton.cpp:534
#18 0x00007ff493f6b299 in QAbstractButtonPrivate::click (this=0x21a8300) at widgets/qabstractbutton.cpp:527
#19 0x00007ff493f6b454 in QAbstractButton::mouseReleaseEvent (this=0x1a6d9c0, e=0x7ffd31d2d8d0) at widgets/qabstractbutton.cpp:1132
#20 0x00007ff493eb21e8 in QWidget::event (this=0x1a6d9c0, event=0x7ffd31d2d8d0) at kernel/qwidget.cpp:9022
#21 0x00007ff493e6eb2c in QApplicationPrivate::notify_helper (this=0x187ab10, receiver=0x1a6d9c0, e=0x7ffd31d2d8d0) at kernel/qapplication.cpp:3720
#22 0x00007ff493e748eb in QApplication::notify (this=0x7ffd31d2d610, receiver=0x7ffd31d2d630, e=0x7ffd31d2d8d0) at kernel/qapplication.cpp:3280
#23 0x00007ff493082c2b in QCoreApplication::notifyInternal (this=0x7ffd31d2e1a0, receiver=receiver@entry=0x1a6d9c0, event=event@entry=0x7ffd31d2d8d0) at kernel/qcoreapplication.cpp:935
#24 0x00007ff493e733da in sendSpontaneousEvent (event=0x7ffd31d2d8d0, receiver=0x1a6d9c0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#25 QApplicationPrivate::sendMouseEvent (receiver=0x1a6d9c0, event=0x7ffd31d2d8d0, alienWidget=0x1a6d9c0, nativeWidget=0x1ab8000, buttonDown=<optimized out>, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:2751
#26 0x00007ff493ecacc0 in QWidgetWindow::handleMouseEvent (this=0x25c1dd0, event=0x7ffd31d2dce0) at kernel/qwidgetwindow.cpp:543
#27 0x00007ff493ecce33 in QWidgetWindow::event (this=0x25c1dd0, event=0x7ffd31d2dce0) at kernel/qwidgetwindow.cpp:210
#28 0x00007ff493e6eb2c in QApplicationPrivate::notify_helper (this=0x187ab10, receiver=0x25c1dd0, e=0x7ffd31d2dce0) at kernel/qapplication.cpp:3720
#29 0x00007ff493e74000 in QApplication::notify (this=0x7ffd31d2e1a0, receiver=0x25c1dd0, e=0x7ffd31d2dce0) at kernel/qapplication.cpp:3503
#30 0x00007ff493082c2b in QCoreApplication::notifyInternal (this=0x7ffd31d2e1a0, receiver=0x25c1dd0, event=0x7ffd31d2dce0) at kernel/qcoreapplication.cpp:935
#31 0x00007ff4938b1f82 in sendSpontaneousEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#32 QGuiApplicationPrivate::processMouseEvent (e=0x3975a90) at kernel/qguiapplication.cpp:1774
#33 0x00007ff4938b3b45 in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x3975a90) at kernel/qguiapplication.cpp:1576
#34 0x00007ff49389834f in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:572
#35 0x00007ff487d4d590 in userEventSourceDispatch (source=<optimized out>) at eventdispatchers/qeventdispatcher_glib.cpp:70
#36 0x00007ff48f4d8c3d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#37 0x00007ff48f4d8f20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#38 0x00007ff48f4d8fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#39 0x00007ff4930dbc57 in QEventDispatcherGlib::processEvents (this=0x18bdd50, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#40 0x00007ff4930803e2 in QEventLoop::exec (this=this@entry=0x7ffd31d2e080, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#41 0x00007ff49308802c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#42 0x00007ff4938a931c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1510
#43 0x00007ff493e6a7a5 in QApplication::exec () at kernel/qapplication.cpp:2956
#44 0x000000000040eebc in main (argc=1, argv=<optimized out>) at ../../app/main.cpp:54

Reported using DrKonqi