RE: Dell TB15 Desktop Dock - Step-by-step driver/firmware/BIOS installation instructions for XPS, Latitude and Precision notebooks
Since my XPS 15 is several days old, I decided to do a system reset, choosing the remove all files/settings and reinstall Windows. I then installed everything in the order suggested in this thread. (Previously, I had installed in the order suggested by the TB15 manual, and it's slightly different.) For me, the end result is unchanged. The dock is pretty stable with audio, Ethernet and external hard drives. However, when I connect my monitor (a U2715H), either via Display Port or mini Display Port, instability starts. This behavior is the same whether I have other connections into the dock or just only video. The video on the monitor cuts in and out, finally resulting in not coming back on.