Is there a way to overscan the resolution? I have a 1920x1080 resolution on a 25 inch monitor and on Windows, in the Catalyst Control Panel there is an option to overscan to 150% or something and it fills my monitor perfectly.

The CCC in Linux that I got from the Proprietary ATI package doesn't have overscanning.

There is a chunk of screen missing all the way around my monitor, any way of overscanning it?