Comment 18 for bug 570291

"fglrx-modaliases" is not a driver. Its description is:

<<In order to identify what hardware is supported by Jockey,
there must be a static list of what the current driver in the Ubuntu
archive supports. This package provides that list.>>

Can you have a look at "System/Administration/Additional Drivers" to see which proprietary drivers are available and also what are being used in your computers?