Application: kwin_x11 (5.3.2)

Qt Version: 5.4.2
Operating System: Linux 4.1.3-201.fc22.x86_64 x86_64
Distribution (Platform): Fedora RPMs

-- Information about the crash:
- What I was doing when the application crashed: Adding the third screen on my NVidia NVS420 Card.   The previous default two monitors work fine.

- Unusual behavior I noticed:Crashing the video after login.

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[KCrash Handler]
#5  0x00007fb73d85b920 in xcb_setup_vendor_end () from /lib64/libxcb.so.1
#6  0x00007fb73d85b979 in xcb_setup_pixmap_formats_iterator () from /lib64/libxcb.so.1
#7  0x00007fb73d85b9b9 in xcb_setup_roots_iterator () from /lib64/libxcb.so.1
#8  0x00007fb73f31c5c7 in NETRootInfo::NETRootInfo(xcb_connection_t*, unsigned int, char const*, QFlags<NET::Property>, QFlags<NET::WindowTypeMask>, QFlags<NET::State>, QFlags<NET::Property2>, QFlags<NET::Action>, int, bool) () from /lib64/libKF5WindowSystem.so.5
#9  0x00007fb747225301 in KWin::RootInfo::create() () from /lib64/libkwin.so.5
#10 0x00007fb7471fa68c in KWin::Workspace::init() () from /lib64/libkwin.so.5
#11 0x00007fb7471fbe0b in KWin::Workspace::Workspace(QString const&) () from /lib64/libkwin.so.5
#12 0x00007fb7472367f0 in KWin::Application::createWorkspace() () from /lib64/libkwin.so.5
#13 0x00007fb74762b2ac in QtPrivate::QFunctorSlotObject<KWin::ApplicationX11::performStartup()::{lambda()#2}, 0, QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*) () from /lib64/libkdeinit5_kwin_x11.so
#14 0x00007fb73dd1ef07 in QMetaObject::activate(QObject*, int, int, void**) () from /lib64/libQt5Core.so.5
#15 0x00007fb73f3000bb in KSelectionOwner::Private::claimSucceeded() () from /lib64/libKF5WindowSystem.so.5
#16 0x00007fb73f300901 in KSelectionOwner::filterEvent(void*) () from /lib64/libKF5WindowSystem.so.5
#17 0x00007fb73dceb04f in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () from /lib64/libQt5Core.so.5
#18 0x00007fb72516e30e in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () from /usr/lib64/qt5/plugins/platforms/libqxcb.so
#19 0x00007fb72516f363 in QXcbConnection::processXcbEvents() () from /usr/lib64/qt5/plugins/platforms/libqxcb.so
#20 0x00007fb73dd1ff41 in QObject::event(QEvent*) () from /lib64/libQt5Core.so.5
#21 0x00007fb73e9b07ec in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib64/libQt5Widgets.so.5
#22 0x00007fb73e9b5e90 in QApplication::notify(QObject*, QEvent*) () from /lib64/libQt5Widgets.so.5
#23 0x00007fb73dcee67b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /lib64/libQt5Core.so.5
#24 0x00007fb73dcf07b7 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /lib64/libQt5Core.so.5
#25 0x00007fb73dd430f2 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#26 0x00007fb7251c33dd in QUnixEventDispatcherQPA::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt5/plugins/platforms/libqxcb.so
#27 0x00007fb73dcebeba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#28 0x00007fb73dcf3a2c in QCoreApplication::exec() () from /lib64/libQt5Core.so.5
#29 0x00007fb74762cb07 in kdemain () from /lib64/libkdeinit5_kwin_x11.so
#30 0x00007fb73c724700 in __libc_start_main () from /lib64/libc.so.6
#31 0x0000000000400c89 in _start ()

Possible duplicates by query: bug 350237, bug 349953, bug 349416, bug 349413, bug 349409.

Reported using DrKonqi