Same problem on HP ProBook 650 G2 . The fix Gijs mentioned, doesn't work
on this model.
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
[HP EliteBook 840 G2, Realtek ALC3228, HP UltraSlim Dock 2013] Line
in/Line out on docking station doesn't work
To manage notifications about this bug go to:
ubuntu-bugs mailing list