Upgrading Ubuntu to 9.04 breaks ATI video card driver, VESA and ati/radeon drivers

"The built-in support for ATI cards in ubuntu 9.04 is better. You shouldn't need the fglrx.

I would suggest doing some kind of test clean-install, though perhaps the Live CD would be sufficient to verify that ubuntu default ATI drivers will work for your system.

The reason I suggest clean install is that customizations for Video (e.g., directly using fglrx rather than using ""hardware drivers"" menu) and customizations for network (e.g., using ndiswrapper) mess with the upgrade process.

After banging my head against strange video problems (and network problems) after an upgrade, I solved my problems with a back-up of my data, including .mozilla directory, a list of installed packages, a clean install, and a manual restoration of my desired environment."