Catalyst 15.3 Beta Backported To Ubuntu 14.04 LTS
Since yesterday, the updated Catalyst 15.3 Beta (fglrx 15.20) has been sitting in "trusty-proposed" for ultimately landing in the Ubuntu Trusty archive as a stable update.
The Catalyst 15.3 driver adds support for the newer X.Org Server and Linux kernel releases plus various other changes. This is the first Catalyst Linux update since the 14.12 Omega driver release from last December.
Details on this big driver back-port to Ubuntu 14.04 can be found via the trusty-changes list.