I have a fresh install of Ubuntu 12.04 and I want to enable my graphics drivers so I can play games. Right now there are two options within the Special Drivers area of System Settings: The graphics driver and the graphics driver (post release updates). It sounds like I want the post release updates but whenever I click to enable it I get this message: look in var/log/jockey.log. Does anyone know what I should do? I have attached two photos that show the screens.