Comment 56 for bug 525149

> I just tried the latest linux-alsa-driver-modules-2.6.32-21-generic (and
> removed the backport modules first). Unfortunately still no mic input,
> it stays completely muted. Sound output on the other hand, works
> flawlessly.

Same thing here. Besides, there is also a different problem, which
also happened when I used Armando's patch. The speakers do not mute
when headphones are inserted, which resembles bug #109838.