I have Ubuntu 12.04 installed on my laptop. When I go to Sound Settings while logged into my user, no sound card appears detected.
In spite of this, the sound on my laptop is working ok, and I can use
alsamixer just fine. The Unity sound indicator is dead, and this is quite annoying.
If I login as guest, the sound indicator works just fine, I assume it's something related to my user's sound settings, but I cannot find what exactly.