Originally Posted by Saptech
Have you tried from a terminal as root, the command, alsamixer and check to see if anything showing with a <M> for mute. Press the M key and unmute it, then press esc key to quit. Once you're out of it, type alsactl store to save the setting.
Saptech, thanks, but it isn't that.
I think the sound is configured corretly, but the sound only works with headphones, I don't know why.
My modpobre.d/sound configuration
alias snd-card-0 snd-hda-intel
options snd-hda-intel index=0