Thanks again for your help, Raymond. I'll try this to see whether I get it working in Wily and Xenial.
Let me link to the bug reporter upstream: https://bugzilla.kernel.org/show_bug.cgi?id=116051 ** Bug watch added: Linux Kernel Bug Tracker #116051 http://bugzilla.kernel.org/show_bug.cgi?id=116051 -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1566596 Title: MBP 8,2 internal microphone stopped working Status in alsa-driver package in Ubuntu: Incomplete Bug description: The internal microphone doesn't work in a Ubuntu Xenial installation. The concrete model is Cirrus Logic CS4206. I've tested with the Xenial live usb (2nd beta) and it doesn't work either, so it doesn't look line I've broken something. However with the Wily live CD (both standard Ubuntu and Kubuntu) it works. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1566596/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp