AMD has released a new Catalyst beta driver for Linux

Highlights of the AMD Catalyst 14.6 Beta Driver for Linux:
This release of AMD Catalyst Linux introduces support for the following new:

Products:

None

Features:

Ubuntu 14.04 support
Install improvements
Package and distribution generation options; recommend options set by default
Help user install generated distribution package once created
Pop-up messages to help guide users through the install process
Identifying and installation of pre-requisites

Resolved Issues:

[399454] : Witcher 2 - Resolves random lock-up seen when launching the application

[398826] : Screen corruption when connect external monitor to some PowerXpress A+I platform
[396719] : X crash when do rotation with Tear Free Desktop enabled
[397810] : Failure on exit of OpenGL programs
[398424] : Error message when run clinfo in console mode
[396098] : Blank screen when hotplug HDMI monitor from MST hub
[396795] : System hang after resume from S3/S4 in High Performance mode on PowerXpress A+I platform
[396870] : Garbage on the bottom right corner of screen before boot into login UI during restart

[394504] : Segmentation fault when run ETQW

Open Issues:

DOTA 2 may hang while playing on the AMD Radeon 7900 or AMD Radeon R9 280X
Witcher 2 exhibits intermittent corruption when swinging sword in the Arena

  AMD Catalyst 14.6 Beta for Linux