First of all - I removed Modified Alsa Upgrade script because it's obsolete.
@jaygade
you wrote: Then I applied your Lucid-patched kernel from your PPA with the same result: playback works, but still nothing on the mic. I've tried adjusting levels with alsamixer with no result.
Patched kernel from my PPA has no mic levels in alsamixer!
I recommend a clean install of Ubuntu. Then add my PPA and upgrade kernel from it. Sound and mic should be ok because your hardware codec is the same as mine. Don't specify model to alsa-base.conf because your subsystem id is correct (17aa:20ac). Use sound applet to adjust mic volume level.
First of all - I removed Modified Alsa Upgrade script because it's obsolete.
@jaygade
you wrote: Then I applied your Lucid-patched kernel from your PPA with the same result: playback works, but still nothing on the mic. I've tried adjusting levels with alsamixer with no result.
Patched kernel from my PPA has no mic levels in alsamixer!
I recommend a clean install of Ubuntu. Then add my PPA and upgrade kernel from it. Sound and mic should be ok because your hardware codec is the same as mine. Don't specify model to alsa-base.conf because your subsystem id is correct (17aa:20ac). Use sound applet to adjust mic volume level.