Bug#791642: Probably not a pulseaudio bug

[Andrew Kane]

I plugged a cable into the "Headphone" jack and poked the other end
with my finger. I heard the telltale buzz in the headphones which
leads me to suspect that the "Headphone" jack is in fact a Line-in.

Since alsamixer reports this jack as a Headphone jack as well, I
suspect that this is not a bug in pavucontrol nor pulseaudio after
all, but in alsa. I will reassign it.