System don't play sound. Don't know but this can be a kernel issue, as regular Ubuntu used to work on these

I used ubuntu before, and this worked nicely with or without intel proprietary drivers. Perhaps It could be a gnome problem either. The info of my machine is on: http://www.alsa-project.org/db/?f=7c628599914b0cb5a888353e08d9fef84b36bc8a