Here's the backtrace, tell me if there's anything more you need:
#0 0x4007e581 in kill () from /lib/libc.so.6
No symbol table info available.
#1 0x4007e394 in raise () from /lib/libc.so.6
No symbol table info available.
#2 0x4007f8d1 in abort () from /lib/libc.so.6
No symbol table info available.
#3 0x0806d5f9 in ddxGiveUp () at xf86Init.c:1094
No locals.
#4 0x0806d6a6 in AbortDDX () at xf86Init.c:1145
i = 1
#5 0x080d3468 in AbortServer () at utils.c:436
No locals.
#6 0x080d4906 in FatalError (
f=0x8174d40 "Caught signal %d. Server aborting\n") at utils.c:1399
beenhere = 1
#7 0x0807f3c8 in xf86SigHandler (signo=11) at xf86Events.c:1085
signo = 11
#8 0x4007e518 in sigaction () from /lib/libc.so.6
No symbol table info available.
#9 0x40197cdc in ?? ()
No symbol table info available.
#10 0x0852b478 in ?? ()
No symbol table info available.
#11 0x0806cabb in InitOutput (pScreenInfo=0x81cbc00, argc=5,
argv=0xbffffdf4)
at xf86Init.c:528
i = 1075228112
j = 0
k = 1074540038
scr_index = 1074540038
No symbol table info available.
#9 0x40197cdc in ?? ()
No symbol table info available.
#10 0x0852b478 in ?? ()
No symbol table info available.
#11 0x0806cabb in InitOutput (pScreenInfo=0x81cbc00, argc=5,
argv=0xbffffdf4)
at xf86Init.c:528
i = 1075228112
j = 0
k = 1074540038
scr_index = 1074540038
generation = 1
modulelist = (char **) 0xbffff9ac
optionlist = (pointer *) 0x81f9890
layout = 0xbffff9ac
screenpix24 = 1074540038
pix24 = 3221224796
pix24From = X_DEFAULT
pix24Fail = 0
#12 0x080bed36 in main (argc=5, argv=<incomplete type>, envp=<incomplete
type>)
at main.c:380
argv = <incomplete type>
i = 256
j = 0
k = 1075228112
error = 1075228112
xauthfile = 0x0
alwaysCheckForInput = {0, 1}