Same here. This is on 12.10 kubuntu. Logging in via nomachine nx. More backtrace from the crash deamon: Application: KDE Daemon (kdeinit4), signal: Segmentation fault Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". [Current thread is 1 (Thread 0x7f156e7e2780 (LWP 20953))] Thread 2 (Thread 0x7f155c029700 (LWP 20955)): #0 0x00007f15739dd303 in poll () from /lib/x86_64-linux-gnu/libc.so.6 #1 0x00007f15708d9d84 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007f15708d9ea4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007f1574e09c16 in QEventDispatcherGlib::processEvents(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #4 0x00007f1574dda2bf in QEventLoop::processEvents(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #5 0x00007f1574dda548 in QEventLoop::exec(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #6 0x00007f1574cdbb10 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #7 0x00007f1574dbc478 in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #8 0x00007f1574cdeaec in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #9 0x00007f15711b2e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0 #10 0x00007f15739e8cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6 #11 0x0000000000000000 in ?? () Thread 1 (Thread 0x7f156e7e2780 (LWP 20953)): [KCrash Handler] #5 0x00007f157397859c in free () from /lib/x86_64-linux-gnu/libc.so.6 #6 0x00007f15756379a9 in XFree () from /usr/lib/x86_64-linux-gnu/libX11.so.6 #7 0x00007f156148f7a6 in XRRUpdateConfiguration () from /usr/lib/x86_64-linux-gnu/libXrandr.so.2 #8 0x00007f1559e7befc in ?? () from /usr/lib/kde4/kded_wacomtablet.so #9 0x00007f1575b56f1e in KApplication::x11EventFilter(_XEvent*) () from /usr/lib/libkdeui.so.5 #10 0x00007f15741ef7bc in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 #11 0x00007f15741ff7f0 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 #12 0x00007f1574227fa2 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 #13 0x00007f15708d9ab5 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #14 0x00007f15708d9de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #15 0x00007f15708d9ea4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #16 0x00007f1574e09bf6 in QEventDispatcherGlib::processEvents(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #17 0x00007f1574227c1e in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 #18 0x00007f1574dda2bf in QEventLoop::processEvents(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #19 0x00007f1574dda548 in QEventLoop::exec(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #20 0x00007f1572156bc6 in ?? () from /usr/lib/x86_64-linux-gnu/libQtDBus.so.4 #21 0x00007f15721447fb in QDBusConnection::call(QDBusMessage const&, QDBus::CallMode, int) const () from /usr/lib/x86_64-linux-gnu/libQtDBus.so.4 #22 0x00007f155b6221d9 in ?? () from /usr/lib/kde4/kded_colord.so #23 0x00007f155b623353 in ?? () from /usr/lib/kde4/kded_colord.so #24 0x00007f1574df043e in QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #25 0x00007f1574182e9c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 #26 0x00007f157418730a in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 #27 0x00007f1575b541d6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5 #28 0x00007f1574ddb56e in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #29 0x00007f1574ddf3f1 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #30 0x00007f1574e09a63 in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #31 0x00007f15708d9ab5 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #32 0x00007f15708d9de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #33 0x00007f15708d9ea4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #34 0x00007f1574e09bf6 in QEventDispatcherGlib::processEvents(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #35 0x00007f1574227c1e in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 #36 0x00007f1574dda2bf in QEventLoop::processEvents(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #37 0x00007f1574dda548 in QEventLoop::exec(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #38 0x00007f1574ddf708 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #39 0x00007f156169f3f0 in kdemain () from /usr/lib/kde4/libkdeinit/libkdeinit4_kded4.so #40 0x00000000004084c6 in _start ()