Fedora 11 -> 12 preupgrade = anaconda with blank screen?

[uppfinnarn]

I used the Preupgrade command to upgrade my Fedora 11 installation to Fedora 12, but when i boot to the "Upgrade to Fedora 12" option in GRUB, Anaconda first starts, then seems to start X and then just hangs in a blank screen. Setting VGA= or Resolution= doesn't make any difference, and setting the Anaconda-option "text" doesn't seem to work. Anyone knows what i've done wrong?

[devils casper]

Which Graphics Card do you have? Try xdriver=vesa option in kernel line.

[uppfinnarn]

ATI MOBILITY RADEON AGP 4X. It's a Compaq Presario 2100, you can see its specs here.

Isn't xdriver=vesa for nVidia cards?

[devils casper]

"vesa" is a Generic Driver and works fine for most of Graphics Cards. You are facing Graphics Card problem only and "vesa" should work fine.

[uppfinnarn]

Now it actually briefly flashes a cursor(i think it's a cursor), and displays some glitched pixels in the top of the screen... Is there anything else you can do?

[devils casper]

Disable kernel mode setting by using nomodeset option.

In case it doesn't work, you have to edit xorg.conf file using LiveCD of any distro.

[uppfinnarn]

That worked, thanks