I have HP Probook 440G1 with Integrated AMD graphics (mars) (discrete) and Intel core i7 Haswell as integrated. I had installed Ubuntu 13.10. but, by default the AMD graphics was not installed. tried the method above, the unity desktop gets completely broken on reboot. Two things happened while installing:-
I downloaded the beta drivers from the AMD site. After doing sudo ./amd_xxxxx.run, the AMD GUI came up, but, all the captions in the GUI were missing only some buttons were visible, so I could not go ahead.
I tried the way shown here (http://ubuntuforums.org/showthread.php?t=1930450), I could not install ia32-libs (it seems the package is not available and gave some options,installed all the suggested options), everything went well, then when I did sudo aticonfig --initial -f, it gave an error that fgrlx was not found in /usr/lib.
so, the question is, in which ubuntu version can I completely support AMD graphics of 8xxx variety. Thanks in advance! Regards, Manoj