Comment 5 for bug 1310622

this look like Jack detection of headphone is inverted

https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/tree/Documentation/sound/alsa/HD-Audio.txt

try hint

 jack_detect (bool): specify whether the jack detection is available
  at all on this machine; default true
- inv_jack_detect (bool): indicates that the jack detection logic is
  inverted