I also have this problem. I have a Lenovo P50 with the Lenovo Thinkpad Workstation Dock (40A50230US) and the sound does not work when I use the dock.
I have:
Ubuntu 14.04.5 LTS
4.4.0-38-generic
I also have this problem. I have a Lenovo P50 with the Lenovo Thinkpad Workstation Dock (40A50230US) and the sound does not work when I use the dock.
I have:
Ubuntu 14.04.5 LTS
4.4.0-38-generic