the headphone jack detection control change from true to false
frequently

alsa-card.c: Jack 'Front Headphone Jack' is now plugged in
Nov 28 23:38:33 bartek-desktop pulseaudio[2190]: ( 28.079| 0.000) [pulseaudio] 
device-port.c: Setting port analog-output-headphones to status yes

Nov 28 23:38:35 bartek-desktop pulseaudio[2190]: (  29.561|   0.053) 
[pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now unplugged
Nov 28 23:38:35 bartek-desktop pulseaudio[2190]: (  29.561|   0.000) 
[pulseaudio] device-port.c: Setting port analog-output-headphones to status no

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

try set hint trigger_sense=false

- trigger_sense (bool): indicates that the jack detection needs the
  explicit call of AC_VERB_SET_PIN_SENSE verb

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https://bugs.launchpad.net/bugs/1256128

Title:
  [Acer Aspire G7711, Realtek ALC888] Underruns, dropouts or crackling
  sound

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