Application: kcminit_startup ()
KDE Platform Version: 4.14.2
Qt Version: 4.8.6
Operating System: Linux 3.16.7-200.fc20.x86_64 x86_64
Distribution: "Fedora release 20 (Heisenbug)"

-- Information about the crash:
- What I was doing when the application crashed:

It occurs every time I log in to KDE.
Also, it occurs every time on click on "restart application" in the KDE crash handler.

The crash can be reproduced every time.

-- Backtrace:
Application: KCMInit (kcminit_startup), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
81	T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
[Current thread is 1 (Thread 0x7f1f4c8168c0 (LWP 693))]

Thread 2 (Thread 0x7f1f40da5700 (LWP 696)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1  0x00000031f0aacc14 in ?? () from /usr/lib64/nvidia/libGL.so.1
#2  0x00000031eeef9b4e in ?? () from /usr/lib64/nvidia/libnvidia-glcore.so.331.89
#3  0x00000031f0aacb23 in ?? () from /usr/lib64/nvidia/libGL.so.1
#4  0x00000031e3407ee5 in start_thread (arg=0x7f1f40da5700) at pthread_create.c:309
#5  0x00000031e28f4b8d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f1f4c8168c0 (LWP 693)):
[KCrash Handler]
#6  __GI___pthread_mutex_lock (mutex=0x0) at ../nptl/pthread_mutex_lock.c:66
#7  0x00000031e604b047 in XrmDestroyDatabase (db=0x870c70) at Xrm.c:2653
#8  0x00000031e6032b83 in _XFreeDisplayStructure (dpy=dpy@entry=0x864d60) at OpenDis.c:618
#9  0x00000031e601fd5f in XCloseDisplay (dpy=0x864d60) at ClDisplay.c:72
#10 0x00000031fa83863e in qt_cleanup () at kernel/qapplication_x11.cpp:2748
#11 0x00000031fa7cbe76 in QApplication::~QApplication (this=0x7fff672cbb10, __in_chrg=<optimized out>) at kernel/qapplication.cpp:1190
#12 0x0000003e65c053a0 in kdemain () from /lib64/libkdeinit4_kcminit_startup.so
#13 0x00000031e2821d65 in __libc_start_main (main=0x400800 <main>, argc=1, argv=0x7fff672cbc78, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff672cbc68) at libc-start.c:285
#14 0x0000000000400831 in _start ()

Reported using DrKonqi