I have just used this website to follow some of the steps to manually create the .deb file from the .zip file that is on the AMD site.
Then I installed them one by one using the Debpackage installer. So I didn't used the command line, but the graphical interface of my OS.
The problem is that when I log in I get this message: "AMD Testing use only"
Here is my fglrxinfo:
:~$ fglrxinfo
display: :0 screen: 0
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon HD 6500M/5600/5700 Series
OpenGL version string: 4.2.12337 Compatibility Profile Context 9.01
Have I done something in the wrong way?