Internal microphone not working

I have an internal microphone in my laptop. I think it uses Intel High Definition Audio. But I can't get it to work with Ubuntu. It doesn't work with either the Sound Recorder or Skype.

On the Input tab in 'Sound Preferences', I just see Internal Analog Input Device...

Solution 1:

This is what I had to do to get the internal mic to work on my Acer Aspire 5745G:

• Install pavucontrol:

  sudo apt install -y pavucontrol`
  

• Run it with:

  sudo pavucontrol
  

• Go to the "Input Devices" tab

• Click the lock icon to unlock the channels

• Set the right-front channel to silence

Solution 2:

Add this line to your /etc/modprobe.d/alsa-base.conf file:

options snd-hda-intel model=dell-vostro enable=1 index=0