I am running Ubuntu 11.10 on a Lenovo T410, and tried to install the Nvidia driver without success! Worst, after the reboot, I was getting a blank screen... tried to fix the Nvidia driver through the console without success to date.
At least I have been able to recover the old config by renaming the xorg.conf file and rebooting.
sudo mv /etc/X11/xorg.conf /etc/X11/xorg.conf.nvidia
and removed the driver
sudo apt-get purge nvidia-settings nvidia-current
Now that I know how to get my screen back in order, will try to install the Nvidia driver later on when I have some spare time.