Application: KWin (kwin), signal: Segmentation fault
[KCrash Handler]
#6  0x00007ff1a67704b1 in dri2DrawableGetMSC (psc=0x7ff18c0014f0, pdraw=0x0, ust=0x7fff7c4cdb88, msc=0x7fff7c4cdb80, sbc=0x7fff7c4cdb78) at dri2_glx.c:226
#7  0x00007ff1a67342c8 in __glXGetVideoSyncSGI (count=0x7fff7c4cdbdc) at glxcmds.c:2317
#8  0x00007ff1a8d105a1 in KWin::SceneOpenGL::waitSync() () from /usr/lib/libkdeinit4_kwin.so
#9  0x00007ff1a8d14b55 in KWin::SceneOpenGL::flushBuffer(int, QRegion) () from /usr/lib/libkdeinit4_kwin.so
#10 0x00007ff1a8d1532a in KWin::SceneOpenGL::paint(QRegion, QList<KWin::Toplevel*>) () from /usr/lib/libkdeinit4_kwin.so
#11 0x00007ff1a8d0144c in KWin::Workspace::performCompositing() () from /usr/lib/libkdeinit4_kwin.so
#12 0x00007ff1a8c8aafd in KWin::Workspace::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkdeinit4_kwin.so
#13 0x00007ff1a52bdd9f in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#14 0x00007ff1a52bb35e in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#15 0x00007ff1a4485854 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#16 0x00007ff1a448993a in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#17 0x00007ff1a84ed146 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#18 0x00007ff1a52a9d3c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#19 0x00007ff1a52d51d2 in ?? () from /usr/lib/libQtCore.so.4
#20 0x00007ff1a52d5310 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#21 0x00007ff1a4525ea2 in ?? () from /usr/lib/libQtGui.so.4
#22 0x00007ff1a52a9122 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#23 0x00007ff1a52a935c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#24 0x00007ff1a52ad76b in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#25 0x00007ff1a8ca5118 in kdemain () from /usr/lib/libkdeinit4_kwin.so
#26 0x00007ff1a8918c4d in __libc_start_main () from /lib/libc.so.6
#27 0x00000000004005c9 in _start ()