Tryied again...

Same result, after the step 5, I got:
DKMS: install completed.
and then, aticonfig --initial -f, gave me:
aticonfig: no supported adapter detected"
Rebooted and, black screen on gdm3. Just the text cursor blinking...
at tty6 I logged and tryied: "service gdm3 restart", it did restart, but to the same state, black screen with a text cursor blinking.

I do need help to get my Kali to the next level using the full power of my graphic card.
I reinstalled Kali again, and I'm updating/upgrading it right now.
I'm running on a Alienware M17xR4, with Radeon HD 7970m.

If anyone can help-me with it, I can run tests, show logs, and any commands you like... just ask please.

Thank you in advance.