= audio (ALSA)

  * https://wiki.archlinux.org/index.php/Advanced_Linux_Sound_Architecture_(Espa%C3%B1ol)
  * https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/996245
  * http://askubuntu.com/questions/456579/how-to-install-hda-jack-retask-in-14-04