Hello,
I was surprised yesterday when I turned on my computer by the following problem with the KDE Plasma Desktop. I cannot remember that I did something special before. I tried to update my system with the installation CD but nothing changed. I also tried “zypper up” but also didn’t help. I cannot log in and I get this error directly after booting. I can run application using Alt+F2 but I don't have any desktop. My graphical card is:

Code:
 NVIDIA Corporation GK107 [Quadro K2000M] [10de:0ffb] (rev a1)
 Subsystem: Hewlett-Packard Company Device [103c:176b]
 Kernel driver in use: nvidia
The problem description:

Code:
Application: plasma-desktop (4.10.5 "release 1")
KDE Platform Version: 4.10.5 "release 1"
Qt Version: 4.8.4
Operating System: Linux 3.7.10-1.16-desktop x86_64
Distribution: "openSUSE 12.3 (x86_64)"

-- Backtrace:
Application: Plasma Desktop Shell (kdeinit4), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f0666760780 (LWP 2751))]

Thread 2 (Thread 0x7f0647e16700 (LWP 2783)):
#0  0x00007f066501e964 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f0659885307 in ?? () from /usr/lib64/libQtScript.so.4
#2  0x00007f0659885339 in ?? () from /usr/lib64/libQtScript.so.4
#3  0x00007f066501ae0f in start_thread () from /lib64/libpthread.so.0
#4  0x00007f0663d9144d in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f0666760780 (LWP 2751)):
[KCrash Handler]
#5  0x00007f06621408d0 in QDBusMessage::arguments() const () from /usr/lib64/libQtDBus.so.4
#6  0x00007f066216e8db in QDBusPendingReplyData::argumentAt(int) const () from /usr/lib64/libQtDBus.so.4
#7  0x00007f0639684a8b in NMNetworkManagerNm09::NMNetworkManagerNm09(QObject*, QList<QVariant> const&) () from /usr/lib64/kde4/solid_networkmanager09.so
#8  0x00007f0639680be7 in ?? () from /usr/lib64/kde4/solid_networkmanager09.so
#9  0x00007f066591a9a5 in KPluginFactory::create(char const*, QWidget*, QObject*, QList<QVariant> const&, QString const&) () from /usr/lib64/libkdecore.so.5
#10 0x00007f0639fae5a9 in ?? () from /usr/lib64/libsolidcontrolnm09.so.4
#11 0x00007f0639fb0e6a in ?? () from /usr/lib64/libsolidcontrolnm09.so.4
#12 0x00007f0639fb339e in Solid::Control::NetworkManagerNm09::networkInterfaces() () from /usr/lib64/libsolidcontrolnm09.so.4
#13 0x00007f063aae9401 in ?? () from /usr/lib64/kde4/plasma_applet_networkmanagement.so
#14 0x00007f063aae997c in ?? () from /usr/lib64/kde4/plasma_applet_networkmanagement.so
#15 0x00007f063aaec877 in ?? () from /usr/lib64/kde4/plasma_applet_networkmanagement.so
#16 0x00007f066591a9a5 in KPluginFactory::create(char const*, QWidget*, QObject*, QList<QVariant> const&, QString const&) () from /usr/lib64/libkdecore.so.5
#17 0x00007f065b91c7ec in Plasma::PluginLoader::loadApplet(QString const&, unsigned int, QList<QVariant> const&) () from /usr/lib64/libplasma.so.3
#18 0x00007f0648ad35bc in ?? () from /usr/lib64/kde4/plasma_applet_systemtray.so
#19 0x00007f0648ad3bd1 in ?? () from /usr/lib64/kde4/plasma_applet_systemtray.so
#20 0x00007f0648ad22d5 in ?? () from /usr/lib64/kde4/plasma_applet_systemtray.so
#21 0x00007f0648ad2714 in ?? () from /usr/lib64/kde4/plasma_applet_systemtray.so
#22 0x00007f0648adc56c in ?? () from /usr/lib64/kde4/plasma_applet_systemtray.so
#23 0x00007f0648ad93e1 in ?? () from /usr/lib64/kde4/plasma_applet_systemtray.so
#24 0x00007f065b8da4e0 in ?? () from /usr/lib64/libplasma.so.3
#25 0x00007f065b8e8ea0 in ?? () from /usr/lib64/libplasma.so.3
#26 0x00007f065b8fc94b in ?? () from /usr/lib64/libplasma.so.3
#27 0x00007f065b8fd5a4 in Plasma::Corona::loadLayout(QString const&) () from /usr/lib64/libplasma.so.3
#28 0x00007f065b8fd66c in Plasma::Corona::initializeLayout(QString const&) () from /usr/lib64/libplasma.so.3
#29 0x00007f0651506be5 in ?? () from /usr/lib64/libkdeinit4_plasma-desktop.so
#30 0x00007f0651506f4d in ?? () from /usr/lib64/libkdeinit4_plasma-desktop.so
#31 0x00007f0651508455 in ?? () from /usr/lib64/libkdeinit4_plasma-desktop.so
#32 0x00007f06653c177e in QObject::event(QEvent*) () from /usr/lib64/libQtCore.so.4
#33 0x00007f066453c974 in QApplication::event(QEvent*) () from /usr/lib64/libQtGui.so.4
#34 0x00007f066453a86c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#35 0x00007f066453eceb in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#36 0x00007f066614e7f6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#37 0x00007f06653acd8e in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#38 0x00007f06653b06f1 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib64/libQtCore.so.4
#39 0x00007f06653db133 in ?? () from /usr/lib64/libQtCore.so.4
#40 0x00007f0660cd47d5 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#41 0x00007f0660cd4b08 in ?? () from /usr/lib64/libglib-2.0.so.0
#42 0x00007f0660cd4bc4 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#43 0x00007f06653db2c6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#44 0x00007f06645dac1e in ?? () from /usr/lib64/libQtGui.so.4
#45 0x00007f06653abadf in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#46 0x00007f06653abd68 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#47 0x00007f06653b0a08 in QCoreApplication::exec() () from /usr/lib64/libQtCore.so.4
#48 0x00007f06514eda31 in kdemain () from /usr/lib64/libkdeinit4_plasma-desktop.so
#49 0x000000000040889a in _start ()