by passing `jack_detect = no` string
via sysfs or a patch file, you can disable the jack detection, thus
the codec parser will skip the features like auto-mute or mic
auto-switch.

The driver create headphone phantom jack and lineout phantom jack
instead of headphone jack and lineout jack

Pulseaudio treat the jack state as unknown instead of no

Not sure you need to manually switch between those port with unknown
jack state,  hp,  line out and spdif

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https://bugs.launchpad.net/bugs/1540372

Title:
  [Intel DP35DP, SigmaTel STAC9271D, Green Speaker, Rear] Underruns,
  dropouts or crackling sound

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