To Daniel T Chen
Frankly I do not really know why it worked maybe it is some module load
options but it worked for me. I have tried many things to make the
microphone working but all were unsuccessful.
If you have some explanation of why this thing worked for me please post
it I will be very than
I had the same problem with my laptop Acer Aspire 5100
solution:
cat /proc/asound/card0/codec#* | grep Codec
you will see your sound card model, in my case output was
Codec: Realtek ALC883
open file:
sudo gedit /etc/modprobe.d/alsa-base.conf
modify line which starts with
options snd-hda-in