(In reply to comment #0)

When installing the Nvidia package (all versions) there is a crash occurs between this package and application KMix.

> Version:            (using KDE 4.1.2)
> OS:                Linux
> Installed from:    Ubuntu Packages
> 
> Application : KMix (kmix), signal SIGABRT
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> [Thread debugging using libthread_db enabled]
> [New Thread 0xb646d8d0 (LWP 5578)]
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> [KCrash handler]
> #6  0xb7fa1430 in __kernel_vsyscall ()
> #7  0xb7df5880 in raise () from /lib/tls/i686/cmov/libc.so.6
> #8  0xb7df7248 in abort () from /lib/tls/i686/cmov/libc.so.6
> #9  0xb75b2795 in qt_message_output () from /usr/lib/libQtCore.so.4
> #10 0xb75b2872 in qFatal () from /usr/lib/libQtCore.so.4
> #11 0xb75b2915 in qt_assert () from /usr/lib/libQtCore.so.4
> #12 0xb79c265a in ?? () from /usr/lib/libsolid.so.4
> #13 0xb79c295f in ?? () from /usr/lib/libsolid.so.4
> #14 0xb76bfa60 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
> #15 0xb76c07e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
> #16 0xb79d4963 in ?? () from /usr/lib/libsolid.so.4
> #17 0xb79fa57e in ?? () from /usr/lib/libsolid.so.4
> #18 0xb79fa66a in ?? () from /usr/lib/libsolid.so.4
> #19 0xb751726e in ?? () from /usr/lib/libQtDBus.so.4
> #20 0xb751e627 in ?? () from /usr/lib/libQtDBus.so.4
> #21 0xb76ba771 in QObject::event () from /usr/lib/libQtCore.so.4
> #22 0xb6ce88ec in QApplicationPrivate::notify_helper ()
>    from /usr/lib/libQtGui.so.4
> #23 0xb6cf076e in QApplication::notify () from /usr/lib/libQtGui.so.4
> #24 0xb7c2c72d in KApplication::notify () from /usr/lib/libkdeui.so.5
> #25 0xb76aae61 in QCoreApplication::notifyInternal ()
>    from /usr/lib/libQtCore.so.4
> #26 0xb76abae5 in QCoreApplicationPrivate::sendPostedEvents ()
>    from /usr/lib/libQtCore.so.4
> #27 0xb76abcdd in QCoreApplication::sendPostedEvents ()
>    from /usr/lib/libQtCore.so.4
> #28 0xb76d582f in ?? () from /usr/lib/libQtCore.so.4
> #29 0xb66906f8 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
> #30 0xb6693da3 in ?? () from /usr/lib/libglib-2.0.so.0
> #31 0xb6693f61 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
> #32 0xb76d5478 in QEventDispatcherGlib::processEvents ()
>    from /usr/lib/libQtCore.so.4
> #33 0xb6d82ee5 in ?? () from /usr/lib/libQtGui.so.4
> #34 0xb76a952a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
> #35 0xb76a96ea in QEventLoop::exec () from /usr/lib/libQtCore.so.4
> #36 0xb76abda5 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
> #37 0xb6ce8767 in QApplication::exec () from /usr/lib/libQtGui.so.4
> #38 0xb7f3aabb in kdemain () from /usr/lib/libkdeinit4_kmix.so
> #39 0x080485a2 in _start ()
> #0  0xb7fa1430 in __kernel_vsyscall ()
> 

Thanks for your report. However, judging from the report and the (incomplete) backtrace, I'd say its the same problem as in bug #174037. 

@Arnaud: If you want and have time you can have a look at http://techbase.kde.org/Development/Tutorials/Debugging/How_to_create_useful_crash_reports, install the debugging symbols and post a more detailed backtrace. (Should not be really needed for this particular crash, but having the debugging symbols installed might come in handy when another program should crash on you.)

*** This bug has been marked as a duplicate of bug 174037 ***