Comment 42 for bug 1365769

umsolicited event was disabled when you enable polling

https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sounda/hda_jack.c?id=34a9318772d00efc5c1af00639526232050c49b8

does your symptom look like the state of jack is/are changing rapidly from plugged and unplugged many times within a second?

 pulseaudio verbose log without specify jackpoll_ms=400