Hi, I'm having the same problem, Ubuntu 9.04 amd-64 fresh install. I have a GeForce 8600 GT and I have installed manually nVidia's latest drivers 180.52 because I'm working on some CUDA projects and can't rely on the versions in the restricted drivers section. I also had to completely remove all the restricted drivers packages in order to be able to install them (probably a bug since it doesn't make sense and it's the only solution). Messing with video drivers is a pain as most of the time I end up not being able to load xserver. So, manually installed drivers, don't have restricted drivers, what should I do?