Comment 2 for bug 1410618

Interesting - that commit does appear to target my machine specifically, and contains a pin configuration for it:

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b5bf0a929d7ca35b9ccfc24647a397899d307659

Oddly, when I upgraded the ALSA driver to the latest as that wiki page outlined, there was still no trace of the headset mic when plugged in. I may try to manually set the pin config to what's outlined in the commit and see if I have any success. Or maybe it's worth trying the other Trusty ALSA driver at the bottom of the list here - once it doesn't have a red X for build status...:

https://code.launchpad.net/~ubuntu-audio-dev/+archive/ubuntu/alsa-daily/+packages

Anyway - thanks for the info! This gives me some runway for testing.