New XPS15 (9550) and two new TB15 (home and office). What an exercise in futility! It has never worked properly. Different problems with home dock and office dock. Problems: external monitor does not work at all on office dock (but does work on home dock); USB does not work at all on either dock; internet/Ethernet does not work on either dock. At this point, the dock is a very expensive charger.
Is there a better solution for: 1) single HDMI external monitor; 2) usb keyboard/mouse; 3) Ethernet; and, 4) charging?
I was told that a WD15 will work better than a TB15, but seriously doubt that.
Since most folks really don't need the Thunderbolt functionality, I have opted for the Dell D3100 Dock. It supports 4K and everything works right out of the box. I have been struggling with and wasting a lot of time on the TB15's and WD15's at the office and home as well and Dell has pretty much admitted that they are "technically challenged" by theses docks. I wish there was a way I could bill them back for the time spent trying to get them to work.