If you have CM108

If you type in lsusb you should see a reference to C-Media Electronics, Inc. CM108 Audio Adapter or Texas Instruments PCM2902 Audio Codec

We'll need to update the firmware, this requires Internet access but only takes 15 minutes or so. You might want to run sudo apt-get update first if you haven't lately. Then run the following commands in order:
sudo apt-get update
sudo apt-get upgrade
sudo reboot

You may see a lot of stuff happening like the below:

Now you can go down to the update alsa module options section

This guide was first published on Sep 17, 2013. It was last updated on Sep 17, 2013.

This page (CM108 Type) was last updated on Apr 07, 2014.

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