Installed Ubuntu precise pangolin and everything is working fine except for my microphones (both internal and external). I have updated the drivers and installed alsa, to no avail. What to do?
When you say you installed alsa, do you mean you installed alsamixer? If not, install alsamixer, pull it up and check to make sure you microphones aren't muted.
Assuming alsamixer is ruled out, post up the output of: