I fiddled with linux again recently. Here is what I ran in to.
Install Linux: Video driver not installed
let it auto install, Reboot to scrambled screen
Google for 45 minutes to find out how to uninstall it from command prompt
Run a bunch of commands to install latest ATI driver manually
Reboot to scrambled screen
after 10 minutes couldn't find the command to uninstall it again
Gave up and went back to windows.
Linux needs more work on usability but that isn't where the development is headed. Hence why it is rarely used by common people. I could put the effort in but I still wouldn't be able to game so I dont.
what distro, what date, what hardware?
Thing is the basic VESA drivers will start fine on 99.999% of all machine (the odd case is widescreen laptops what have that fugly intel chip todo VBIOS patching at startup). THIS use to be an issue with 2yo distro but not these days (esp with intel working really well with the kernel)
Windows only comes with VESA drivers so there is no difference
Ubuntu then provides you with an option to install "Restrictive Drivers" eg nVidia or ATi, no going to any website to find download or anything, it does it for you.
Sounds like you were using an outdated disk or a non-newbie distro.
Stick with Ubuntu if you don't know what you are doing. Newbiew windows user don't get Windows 2008 Server do they? they get Vista home premium