It is very important that you COMPLETELY remove the old driver which includes the config files because when upgrading without uninstalling the old driver I noticed even though the new driver installed and worked there were some annoying problems that I experienced but after I completely uninstalled the old driver then installed the new one, it worked perfectly.
Not sure if you meant in 12.04 or 11.10. I've just booted into a Live CD for 12.04, so here are my diaetls for that. I'll post 11.10 in a minute or two when I reboot. Grub parameters , although I did boot with nomodeset' enabled from the Live CD menu as well:GRUB_CMDLINE_LINUX_DEFAULT= quiet splash And my Kernel: Linux ubuntu 3. 2.0 - 8- generic #15- Ubuntu SMP Wed Jan 11 13:57:44 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux