I am using Ubuntu 16.04. My microphone is not working. My speakers are working though. I got a Macbook Pro from late 2011. Someone got any tips how to fix this? I played with the audio settings but nothing worked so far.
I have a MacBook Pro Core i5 2.5 13" Retina 2012 and was in the same position, sound worked fine but no microphone.
Adding the following line to the bottom of
/etc/modprobe.d/alsa-base.conf worked for me:
options snd-hda-intel model=mbp101
I think I had done this in the past but a clean install of Xenial had removed the line.
After a reboot the mic was working again!