I'm new here, in fact im new on the linux world.
I've had some issues with ubuntu. Nothing that I couldn't managed to fix. But I'm having this problem with sound.
The first clean install I made sound worked perfect with pulseaudio eq, untill I installed some pluggins for TuxGuitar (MIDI sound, etc). And then my speakers just stopped working.
I did a reinstall of ubuntu 12.10 thinking it will fix the problem and it did. I installed pulseaudio and it was working fine, but 2 days later I got the same problem.
I've been searching through google and some threads here but I can't find the solution for my exact problem. And I've tried everything.
I'm adding a screen capture of Sound Settings in wich there's no sound drivers on the list (it had, but not anymore).. as you can see it's in spanish, but its only for illustration purposes ;)
I have a hp laptop.
I appreciate any help!