How do I switch to a recommended package using Ubuntu 12.04?
Sometimes, there will be two or more packages that contain different versions of the same driver. In some cases, a newer version of a driver (installed by an earlier package) can be upgraded by installing a different package (containing the newest version of the video driver).
To install a specific package on your machine, do the following:
For more information on video drivers, see https://wiki.ubuntu.com/Valve.