This set of wiki pages is intended to help anyone dealing with audio issues be that users, developers, testers or bug triagers. It is a jumping off point to get relevant information quickly.
- No sound from speakers.
- No sound from microphone.
How to request a PulseAudio verbose log
How to request alsa-info (if the apport information isn't enough)
How to determine if two bug reports have the same hardware.
An article about audio debugging techniques, generally directed towards hardware manufactures and Ubuntu 11.10, but gives some interesting explanations nonetheless.