xorg crashing on x86_64

[Sadda Teh]

After latest rawhide update, xorg no longer starts up. From the log:

(==) Log file: "/var/log/Xorg.0.log", Time: Tue Jan 10 20:42:01 2006
(==) Using config file: "/etc/X11/xorg.conf"
(==) ServerLayout "Default Layout"
(**) |-->Screen "Screen0" (0)
(**) |   |-->Monitor "Monitor0"
(**) |   |-->Device "Videocard0"
(**) |-->Input Device "Mouse0"
(**) |-->Input Device "Keyboard0"
(**) FontPath set to "unix/:7100"
(==) RgbPath set to "/usr/lib/X11/rgb"
(==) ModulePath set to "/usr/lib64/xorg/modules"
Couldn't open RGB_DB '/usr/lib/X11/rgb'
(II) Module ABI versions:
    X.Org ANSI C Emulation: 0.2
    X.Org Video Driver: 0.8
    X.Org XInput driver : 0.5
    X.Org Server Extension : 0.2
    X.Org Font Renderer : 0.4
(II) Loader running on linux
(II) LoadModule: "bitmap"
(WW) Warning, couldn't open module bitmap
(II) UnloadModule: "bitmap"
(EE) Failed to load module "bitmap" (module does not exist, 0)
(II) LoadModule: "pcidata"
(II) Loading /usr/lib64/xorg/modules/libpcidata.so
(II) Module pcidata: vendor="X.Org Foundation"
    compiled for 6.99.99.902, module version = 1.0.0
    ABI class: X.Org Video Driver, version 0.8

Fatal server error:
Unable to load required base modules, Exiting...

(WW) xf86CloseConsole: KDSETMODE failed: Bad file descriptor
(WW) xf86CloseConsole: VT_GETMODE failed: Bad file descriptor

Also, yum emitted an error (something about -e compilation error or
something along these lines) when it updated xorg-x11-xfs.

My system is an Athlon 64 3200+, motherboard is an Asus A8N-VM (NForce 410
with integrated GeForce 6100).

Also, here's a snip from /var/log/messages:

Jan 10 20:38:12 codebeast gdm[2255]: gdm_slave_xioerror_handler: Fatal X
error - Restarting :0
Jan 10 20:38:16 codebeast gdm[2270]: gdm_slave_xioerror_handler: Fatal X
error - Restarting :0
Jan 10 20:38:20 codebeast gdm[2282]: gdm_slave_xioerror_handler: Fatal X
error - Restarting :0
Jan 10 20:38:20 codebeast gdm[2223]: deal_with_x_crashes: Running the
XKeepsCrashing script
Jan 10 20:38:28 codebeast gdm[2223]: Failed to start X server several times
in a short time period; disabling display :0
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