I have some issues with alsa and audio on latest debian(8.6.0) wit kernel version 3.16. The audio won't work, in fact any program that is supposed to play some sounds(youtube on firefox, for instance), won't play anything. I am pretty sure that this problems comes from gnome and alsa not wanting to work together. The sound card is recognized ( I can see it in alsamixer), 'speaker-test' will play sounds, but when i try to enter in default gnome's mixer, it's empty. I would appreciate if you would tell me what packages I have to install (I searched it on internet a lot, no results), and eventually to tell me if I have to do something more than installing. 
alsa integration for gnome doesn't work
linux;debian;gnome;audio;alsa