Comment 18 for bug 102818

My computer is a macbook second gen dual core.
I just upgraded to new kernel in Ubuntu Feisty: 2.6.20-16-generic #2 SMP Fri Aug 31 00:55:27 UTC 2007 i686 GNU/Linux

Before sound controls worked ok, only sound recording from built-in mic would not work.
After upgrading to this new kernel i get similar problems as described above:

I control the sound output via gnome-volume-control

- master controls treble
- front controls bass
(both put to zero mutes the sound)

- recording from front mic works!!
- recording from microphone jacked into mic outlet stopped working

- headphones no longer give sound output
  -> unless:
    - selecting "line in as output" in the switches tab
    - using surround to control the output volume
    - jacking the headphones in the mic outlet
    - putting master and front to mute to mute the sound on the speakers

attached my codec#0

maybe this helps you along. if you need more output, i'm happy to help...