I have a 2012 Alienware x51 and I installed Ubuntu 13.04 on it with the hdmi plugged into my Nvidia 660 graphics card. It installed the nouveau drivers by default and I have no option in the "additional drivers" section to install Nvidia driver so I installed it manually from the Nvidia web site but Steam complains that there is a OpenGL incompatibility.
Why is there no option to install Nvidia drivers in the "additional drivers" section?
All I want to do is have Nvidia drivers to test out Steam on Linux.