I uninstalled colord-kde and now I got this instead: 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 0x7f44ddbea780 (LWP 21904))] Thread 5 (Thread 0x7f44cb431700 (LWP 21906)): #0 0x00007f44e05be05d in pthread_mutex_unlock () from /lib/x86_64-linux-gnu/libpthread.so.0 #1 0x00007f44dfd1ee51 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007f44dfce1c5c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007f44dfce1ea4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #4 0x00007f44e4211c16 in QEventDispatcherGlib::processEvents(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #5 0x00007f44e41e22bf in QEventLoop::processEvents(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #6 0x00007f44e41e2548 in QEventLoop::exec(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #7 0x00007f44e40e3b10 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #8 0x00007f44e41c4478 in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #9 0x00007f44e40e6aec in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #10 0x00007f44e05bae9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0 #11 0x00007f44e2df0cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6 #12 0x0000000000000000 in ?? () Thread 4 (Thread 0x7f44bfcfe700 (LWP 21918)): #0 0x00007f44e05bcf69 in pthread_mutex_lock () from /lib/x86_64-linux-gnu/libpthread.so.0 #1 0x00007f44dfd1ee21 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007f44dfce1193 in g_main_context_release () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007f44dfce1d35 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #4 0x00007f44dfce21e2 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #5 0x00007f44bffea4a6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0 #6 0x00007f44dfd05645 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #7 0x00007f44e05bae9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0 #8 0x00007f44e2df0cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6 #9 0x0000000000000000 in ?? () Thread 3 (Thread 0x7f44bf2f1700 (LWP 21921)): #0 0x00007f44e2de5303 in poll () from /lib/x86_64-linux-gnu/libc.so.6 #1 0x00007f44dfce1d84 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007f44dfce1ea4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007f44e4211c16 in QEventDispatcherGlib::processEvents(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #4 0x00007f44e41e22bf in QEventLoop::processEvents(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #5 0x00007f44e41e2548 in QEventLoop::exec(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #6 0x00007f44e40e3b10 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #7 0x00007f44c8872352 in KCupsConnection::run() () from /usr/lib/libkcupslib.so #8 0x00007f44e40e6aec in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #9 0x00007f44e05bae9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0 #10 0x00007f44e2df0cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6 #11 0x0000000000000000 in ?? () Thread 2 (Thread 0x7f44beaf0700 (LWP 21922)): #0 0x00007f44dfd1ebb2 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #1 0x00007f44dfd1ee19 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007f44dfce1623 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007f44dfce1cab in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #4 0x00007f44dfce1ea4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #5 0x00007f44e4211c16 in QEventDispatcherGlib::processEvents(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #6 0x00007f44e41e22bf in QEventLoop::processEvents(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #7 0x00007f44e41e2548 in QEventLoop::exec(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #8 0x00007f44e40e3b10 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #9 0x00007f44e40e6aec in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #10 0x00007f44e05bae9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0 #11 0x00007f44e2df0cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6 #12 0x0000000000000000 in ?? () Thread 1 (Thread 0x7f44ddbea780 (LWP 21904)): [KCrash Handler] #5 0x00007f44e2d8059c in free () from /lib/x86_64-linux-gnu/libc.so.6 #6 0x00007f44e4a3f9a9 in XFree () from /usr/lib/x86_64-linux-gnu/libX11.so.6 #7 0x00007f44d08977a6 in XRRUpdateConfiguration () from /usr/lib/x86_64-linux-gnu/libXrandr.so.2 #8 0x00007f44c96e9efc in ?? () from /usr/lib/kde4/kded_wacomtablet.so #9 0x00007f44e4f5ef1e in KApplication::x11EventFilter(_XEvent*) () from /usr/lib/libkdeui.so.5 #10 0x00007f44e35f77bc in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 #11 0x00007f44e36077f0 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 #12 0x00007f44e362ffa2 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 #13 0x00007f44dfce1ab5 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #14 0x00007f44dfce1de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #15 0x00007f44dfce1ea4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #16 0x00007f44e4211bf6 in QEventDispatcherGlib::processEvents(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #17 0x00007f44e362fc1e in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 #18 0x00007f44e41e22bf in QEventLoop::processEvents(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #19 0x00007f44e41e2548 in QEventLoop::exec(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #20 0x00007f44e41e7708 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 #21 0x00007f44d0aa73f0 in kdemain () from /usr/lib/kde4/libkdeinit/libkdeinit4_kded4.so #22 0x00000000004084c6 in _start () *sigh*