Yes, i think i'll give another try today. Im not in the computer right now, but my card it's a GTX 850m or 860m using the audio by HDMI connection. Late last night, the volume has changed after a few tries, but im still without sound in the front-end and in the games.
I saw a possible solution using the Putty to change audio conf of Linux switching devices, i think i'll try that too.
By the way, is there a solution to acess Shell without network? I've pressed F4, but looks like i can't use any command.