I followed these instructions:
http://support.displaylink.com/knowl.../615714#ubuntu
http://support.displaylink.com/knowl...work-on-ubuntu
When I do xrandr or lsusb I do not see any DisplayLink devices (that aren't there when the dock is not plugged in). The usb ports and Ethernet ports on the dock work fine though. On Ubuntu 15.04 I had this same dock and same machine working. I've attached the output from the support tool.
Please help,Tthanks!