This is a very strange bug. After the upgrade from Hardy (where sound worked fine) to Intrepid sound stopped working. I tried all of the tips in https://wiki.ubuntu.com/DebuggingSoundProblems but nothing worked. I downloaded the latest alsa drivers (1.0.18a) and compiled and installed them. Now I can get a very quiet "squeal" out of the speakers for the PC Beep, but otherwise no sound. I have played around with alsamixer (run as alsamixer and "alsamixer -Dhw") and everything is set to 100%, no muting. I have tried it with all of the switches on and off in all combinations but nothing seems to work. One time it did work after I was moving the sliders for volume up and down in the Gtk volume control panel, but as soon as I rebooted it went back to not working. I'm going to try to boot from the install CD just to rule out some configuration issue, but otherwise I'm not sure what else to do. Output from alsa-info.sh is here:
http://www.alsa-project.org/db/?f=20722ec6448d33897672f88c07f11d5792c1bb8b
Thanks.
