[CentOS] X broken after up2date

Hello,

I've installed Centos 4.2 X86_64 on a PE2800 box with a Radeon 700 card and
a generic Dell monitor.

After running up2date before putting this box in production and make a
reboot I can't get into X anymore, my monitor shows a message "out of sync"
and that's it.

So I tried logging in via ssh to run 'setup' and to use the X setup program,
but it doesn't want to start.

So I changed /etc/inittab to 3 insead of 5 and rebooted again. Now running
setup from the box itself still doesn't seem to work quite well. I only get
the message probing and that's about it.

The videcard or monitor are still working flawlessy because using a live CD
with X  isn't a problem.

Any ideas what went wrong? Because I'm thinking of reinstalling but don't
want to run into this same problem again..

kind regards,

Geert
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