Hello Linux Geeksters. As you may know, the AMD Catalyst 14.6 Beta drivers for Linux have been recently released, coming with enhanced support for Ubuntu 14.04 Trusty Tahr and derivative systems.

Among others, new libraries have been added, some kernel optimizations have been implemented for a better performance and a new installation wizard has been created so that the installation process will be easier for the user. Also, a new tool for looking for missing dependencies has been added and some bugs reported by Valve have been squashed. Also, a list of the supported GPUs is available in the official release notes.
In this article I will show you how to install AMD Catalyst 14.6 Beta on Ubuntu 14.04 Trusty Tahr, Linux Mint 17 Qiana, Pinguy OS 14.04, LXLE 14.04, Elementary OS 0.3 Freya, Deepin 2014, LXLE 14.04, Linux Lite 2.0, Peppermint Five and other Ubuntu 14.04 derivative systems.
Follow the instructions exactly, in order to get a successful installation.
Download the latest AMD Catalyst 14.6 Beta driver.
$ cd ~/Downloads
$ unzip linux-amd-catalyst-14.6-beta-v1.0-jul11.zip
$ cd fglrx-14.20
Kill the display manager, which can either be: kdm for KDE, gdm for Gnome, lightdm for LXDE and XFCE (i think), mdm (for Linux Mint):
$ sudo /etc/init.d/kdm stop
OR:
$ sudo /etc/init.d/gdm stop
OR:
$ sudo /etc/init.d/lightdm stop
OR:
$ sudo /etc/init.d/mdm stop
Run the installer:
$ sudo ./amd-driver-installer-14.20-x86.x86_64.run