I dont think Im qualified enough to teach you how unfortually. Ive only done this once myself and it was some time ago now, I dont remember in detail how I did it. I used the guide provided in my last post in this tread, I'll put the relevant section in the spoiler below.Warning: Spoiler! (Click to show)
2.1. Installing via the command line
For users who find that the Additional Drivers method does not work correctly, the driver may also be installed from the Ubuntu repositories using the terminal.
(Note: If your machine has hybrid Intel/AMD switchable graphics, please consult the Ubuntu Forums thread here first and refer to the section titled "Manually installing Catalyst 12.6, special case for Intel/AMD hybrid graphics" in this wiki. At the time of writing, the method described below MAY NOT WORK for Intel/AMD switchable graphics. If you have an Intel/AMD hybrid, it is advisable to wait until further instructions are available).
Save a backup copy of xorg.conf in case this doesn't work.
sudo cp /etc/X11/xorg.conf /etc/X11/xorg.conf.BAK
Remove/purge current fglrx and fglrx-amdcccle (If you have used a method outside of aptitude, apt, Software Center or Synaptic, follow the other party's instructions for removal):
sudo apt-get remove --purge fglrx fglrx-amdcccle
For some users, the fglrx-updates and fglrx-amdcccle-updates packages do not work. If you attempted to install them, also do:
sudo apt-get remove --purge fglrx-updates fglrx-amdcccle-updates
Install the driver:
sudo apt-get install fglrx fglrx-amdcccle
Generate a fresh xorg.conf BEFORE REBOOTING!
sudo aticonfig --initial
sudo amdconfig --initial
If you are using multiple AMD graphics cards or AMD dual graphics (i.e.: notebook users), use:
sudo aticonfig --adapter=all --initial
sudo amdconfig --adapter=all --initial
To confirm the drivers are working open a terminal and type:
You should get an output similar to the following:
display: :0 screen: 0
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon HD 6300M Series
OpenGL version string: 4.2.11733 Compatibility Profile Context
Use the Catalyst Control Center to make final adjustments to your monitor setup. If, after rebooting, you are presented with the message "Could not apply the stored configuration for monitors", do not be alarmed. It simply means that you will have to use the Catalyst Control Center to configure your monitors as you should even in the case where this warning is not shown. This most likely to happen with multiple monitor applications (particularly if the monitors are of different sizes) and multiple graphics card applications.
sorry that I cant help you any more than that. On another hand, welcome to OCN