Why you don't install nvidia drivers ? You're using the old ones.
http://ubuntuguide.org/wiki/Ubuntu:Feisty#How_to_setup_nvidia_drivers_in_7.04
Why you don't install nvidia drivers ? You're using the old ones.
http:// ubuntuguide. org/wiki/ Ubuntu: Feisty# How_to_ setup_nvidia_ drivers_ in_7.04