Xorg seems broken after upgrading to 9.04

[scar]

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hi all,

i finally upgraded an 8.10 machine to 9.04 (x86_64), and now Xorg seems
to be broken.

upon rebooting, when Xorg started, i got a bunch of rubbish on the screen.

the machine has an ATI HD4850 video card in it, so i tried to install
their proprietary driver, version 9.12.  the installation went fine, no
errors.  now, when i rebooted and Xorg loads, i get no video signal at all.

not sure what else to try, so i would appreciate any help.

thanks!
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