Application: KWin (kwin), signal: Segmentation fault
[KCrash Handler]
#6  0x00007ffbd18f3485 in dri2DrawableGetMSC (psc=0x7ffbb80015d0, pdraw=0x0, ust=0x7fff49eb4ec8, msc=0x7fff49eb4ec0, sbc=0x7fff49eb4eb8) at dri2_glx.c:226
#7  0x00007ffbd18b7288 in __glXGetVideoSyncSGI (count=0x7fff49eb4f1c) at glxcmds.c:2317
#8  0x00007ffbd3e935a1 in KWin::SceneOpenGL::waitSync() () from /usr/lib/libkdeinit4_kwin.so
#9  0x00007ffbd3e97b10 in KWin::SceneOpenGL::flushBuffer(int, QRegion) () from /usr/lib/libkdeinit4_kwin.so
#10 0x00007ffbd3e9832a in KWin::SceneOpenGL::paint(QRegion, QList<KWin::Toplevel*>) () from /usr/lib/libkdeinit4_kwin.so
#11 0x00007ffbd3e8444c in KWin::Workspace::performCompositing() () from /usr/lib/libkdeinit4_kwin.so
#12 0x00007ffbd3e0dafd in KWin::Workspace::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkdeinit4_kwin.so
#13 0x00007ffbd0440d9f in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#14 0x00007ffbd043e35e in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#15 0x00007ffbcf608854 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#16 0x00007ffbcf60c93a in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#17 0x00007ffbd3670146 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#18 0x00007ffbd042cd3c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#19 0x00007ffbd04581d2 in ?? () from /usr/lib/libQtCore.so.4
#20 0x00007ffbd0458310 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#21 0x00007ffbcf6a8ea2 in ?? () from /usr/lib/libQtGui.so.4
#22 0x00007ffbd042c122 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#23 0x00007ffbd042c35c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#24 0x00007ffbd043076b in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#25 0x00007ffbd3e28118 in kdemain () from /usr/lib/libkdeinit4_kwin.so
#26 0x00007ffbd3a9bc4d in __libc_start_main () from /lib/libc.so.6
#27 0x00000000004005c9 in _start ()