RE: xps 13 9350 external monitor turn black then back on again
The issue was contained with the July updates from Dell on my XPS9350 with 4K Sansung connected though TB to DVI adapter from Startech. I still had the occasional black out but it was something like once or twice a day.
Today, a major update from Windows 10 as well as some updates from Dell were installed and the external screen now blacks out much more often, escalating the issue back to annoying.
Dell, what did you break??