If that part works for you, and the screen is normal. THen it's ok. I'd check the following as well, this is normally an indication it really works namely: direct rendering.
In the shell type:
Code:
glxinfo | grep direct
There should be a YES.
Also just do glxinfo and see what driver it's using.
Something like this:
Code:
OpenGL version string: 2.1.1 NVIDIA 100.14.09
Btw , how is your sound?