Internal microphone used to be recognized, but not anymore.

[Edward.H]

I have an Acer Aspire One D150.

Sound has always worked well. From a fresh Karmic install I add
Code:

alias snd-card-0 snd-hda-intel
echo options snd-hda-intel model=acer

to
/etc/modprobe.d/alsa-base.co

and after rebooting I have the options "Microphone 1" and "Microphone 2" for the sound input.
But a few weeks ago they disappeared and now I only have external microphone.

Have no idea what can be causing this...

A few outputs below.

Thanks for the help! www.linuxine.com