Xorg: ../../../include/privates.h:124: dixGetPrivateAddr: Assertion `key->initialized' failed.

Program received signal SIGABRT, Aborted.
[Switching to Thread 0xb737f6c0 (LWP 30279)]
0xb781b430 in __kernel_vsyscall ()
(gdb) bt
#0  0xb781b430 in __kernel_vsyscall ()
#1  0xb73c56d0 in raise () from /lib/tls/i686/cmov/libc.so.6
#2  0xb73c7098 in abort () from /lib/tls/i686/cmov/libc.so.6
#3  0xb73be5ce in __assert_fail () from /lib/tls/i686/cmov/libc.so.6
#4  0x08183a49 in dixGetPrivateAddr (privates=0x9bd4390, key=0x8243960)
    at ../../../include/privates.h:124
#5  0x081839f6 in dixSetPrivate (privates=0x9bd4390, key=0x8243960, 
    val=0x9bbfb88) at ../../../include/privates.h:152
#6  0x0818376e in xf86HandleColormaps (pScreen=0x9bd4240, maxColors=256, 
    sigRGBbits=8, loadPalette=0xb731d683 <NVDACLoadPalette>, setOverscan=0, 
    flags=3) at xf86cmap.c:182
#7  0xb73225fb in NVScreenInit (scrnIndex=0, pScreen=0x9bd4240, argc=3, 
    argv=0xbfa590f4) at nv_driver.c:2461
#8  0x08093501 in AddScreen (pfnInit=0xb7321fac <NVScreenInit>, argc=3, 
    argv=0xbfa590f4) at dispatch.c:4063
#9  0x080bfc89 in InitOutput (pScreenInfo=0x8244980, argc=3, argv=0xbfa590f4)
    at xf86Init.c:1055
#10 0x08064b11 in main (argc=3, argv=0xbfa590f4, envp=0xbfa59104) at main.c:201
(gdb)