Comment 83 for bug 874535

UPDATE:
even after disconnection of the front audio panel, the issue still happens once in a blue moon:
Left pulseaudio in debug mode for several days after fix:

$ tail -f /tmp/pulseaudio.log | grep is.now

(3284.252| 96.036) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now plugged in
(3285.280| 1.006) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now unplugged
(4430.108| 136.098) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now plugged in
(4431.133| 1.003) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now unplugged
(65064.220| 35.638) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now plugged in
(65065.244| 1.023) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now unplugged
(163655.996| 23.995) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now plugged in
(163657.020| 1.023) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now unplugged
(166826.748| 0.027) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now plugged in
(166827.772| 0.712) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now unplugged
(170071.580| 2.337) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now plugged in
(170072.605| 0.483) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now unplugged
(170196.156| 63.020) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now plugged in
(170197.180| 1.022) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now unplugged
(173292.956| 110.638) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now plugged in
(173293.980| 1.023) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now unplugged
(405426.784| 13.234) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now plugged in
(405427.804| 0.998) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now unplugged
(501250.208| 28.079) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now plugged in
(501251.228| 1.018) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now unplugged
(508205.532| 1.475) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now plugged in
(508206.556| 1.022) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now unplugged
(576198.464| 60.134) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now plugged in
(576199.484| 1.018) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now unplugged
(577215.964| 3.252) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now plugged in
(577216.992| 0.726) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now unplugged
(577250.780| 26.097) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now plugged in
(577251.804| 1.022) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now unplugged
(577291.740| 0.147) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now plugged in
(577292.764| 0.515) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now unplugged
(577495.964| 54.201) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now plugged in
(577496.988| 1.023) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now unplugged
(578591.196| 137.355) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now plugged in
(578592.220| 1.022) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now unplugged
(589797.436| 1.779) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now plugged in
(589798.460| 1.022) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now unplugged
(589802.556| 4.095) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now plugged in
(589803.580| 1.022) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now unplugged
(593142.972| 274.353) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now plugged in
(593143.996| 1.002) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now unplugged
(593435.804| 267.849) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now plugged in
(593436.832| 1.005) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now unplugged
(594411.680| 25.302) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now plugged in
(594412.700| 1.001) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now unplugged
(594960.540| 37.896) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now plugged in
(594961.564| 1.002) D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now unplugged