Another display problem question

[Russ Foster]

I have a HP Pavilion laptop with an ATI Radeon XPRESS 200M graphics card,
running Ubuntu 9.04 with Gnome desktop.

I tried running an ATI upgrade, but now my display is scrambled.  I can
boot, go through GRUB, get the splash screen, but just as it switches into
what should be the log in screen the display goes to garbage (it's
scrambled, not completely blank).

Ctrl-Alt-F1 does nothing. But pressing the power button does begin an APCI
shutdown--so I know it's not completely locked up.

I added 'driver "vesa" ' to xorg.conf, but the results are the same.  I also
tried copying a previous xorg.conf, but that doesn't help either.  Nor does
"sudo dpkg-reconfigure xserver-xorg" have any affect.

If someone can point me in the right direction on what I can do, it would be
great.

Thanks.

-r

Russ Foster