I have just upgraded from 10.04LTS to 12.04LTS. Upon upgrade, the internal microphone stopped working. It was working fine before the upgrade. The external mic (front plug) does not work either. Very uncool.
I have tried installing and playing with pavucontrol and alsamixer to no good
Any advice is welcome.
>> uname -a
Linux Simone-Dell 3.2.0-26-generic-pae #41-Ubuntu SMP Thu Jun 14 16:45:14 UTC 2012 i686 i686 i386 GNU/Linux