Comment 10 for bug 284505

X is crashing for me too, I have a similar backtrace. Upgraded from 8.04 to 8.10, fglrx 8.54.3, using Radeon 3650 card.

(II) Loading sub module "fglrxdrm"
(II) LoadModule: "fglrxdrm"

(II) Loading /usr/lib/xorg/modules/linux//libfglrxdrm.so
(II) Module fglrxdrm: vendor="FireGL - ATI Technologies Inc."
 compiled for 1.4.99.906, module version = 8.54.3
 ABI class: X.Org Server Extension, version 1.1
(II) fglrx(0): Using adapter: 1:0.0.

Backtrace:
0: /usr/X11R6/bin/X(xf86SigHandler+0x79) [0x80c3009]
1: [0xb7f6b400]
2: /usr/lib/xorg/modules/drivers//fglrx_drv.so(atiddxPcsLoadKernelDatabase+0xbc) [0xb770b4cc]
3: /usr/lib/xorg/modules/drivers//fglrx_drv.so [0xb76e9ffa]
4: /usr/lib/xorg/modules/drivers//fglrx_drv.so(atiddxPreInit+0x764) [0xb76e2d44]
5: /usr/X11R6/bin/X(InitOutput+0x96f) [0x80aac9f]
6: /usr/X11R6/bin/X(main+0x279) [0x8071b19]
7: /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe5) [0xb7b6e685]
8: /usr/X11R6/bin/X [0x8071101]
Saw signal 11. Server aborting.