Comment 6 for bug 1888992

After you plug in the headphone, the headphone jack should change to available yes, but according to the log in the #3, it is still available no:

  analog-output-headphones: Headphones (priority 9900, latency offset 0 usec, available: no)
   properties:
    device.icon_name = "audio-headphones"

That is the reason the audio didn't auto switch. Looks like this is a kernel driver issue.

please do a test:

plug in the headphone, and the headphone can't output sound, then run 'alsa-info.sh to generate alsa-info.txt and run cat /proc/asound/card1/codec#0", now please check if headphone could work now? and upload the alsa-info.txt and the log of 'pacmd list'.

thx.