Ubuntu 14.04 and catalyst 14.4/14.6.
A few days ago, eh ubuntu installed but the problem is in catalyst, installing and then I rebooted the first erases all the bios settings.
Also I start the "check button on the motherboard memory" After all this starts with your purple ubuntu screen, but gives no image.
My pc is a amd fx 8120 and 7870 diretcu asus 2 asus mother board M5A88-m.(sony 32tv - viewsonic 22 vx2240w)
Sorry to be pushy, but this problem is me.
Try looking for some help on some forum and linux without comments eh previously installed versions of catalyst but did not have this problem.