low res after F12 upgrade

[Greg Woods]

I just upgraded my laptop from Fedora 11 to Fedora 12, using the DVD.
Unfortunately I cannot get it to do any better than 800x600 resolution
which really sucks. The laptop has a 1024x768 LCD display, but even
using system-config-display to set this doesn't help, even after
rebooting I still can't do better than 800x600. The machine has an Intel
graphics chip. Is there anything I can do to get back to 1024x768 which
I know the hardware is capable of?

Would I have better luck if I just install fresh over the top instead of
upgrading? I'll do that if I have to rather than be stuck with 800x600,
but it will be a lot of work to reconfigure everything. My home
directory is on another partition so I am safe there, but any
system-wide settings will have to be redone manually.

The only other option is to restore my F11 system from backup and
obviously I do not want to do that, I would rather move forward than
backward.

--Greg