Within the last couple of weeks my Samsung UHD monitor has started flashing on and off (basically going black for ~1 second and then coming back on). It does this when the display is connected to both the SP4 mini-display port and either of the dock's mini-display ports. It never used to do this. I've had the same configuration for over a year. All drivers and Windows 10 are up to date. At first I thought it might be the cable. So I replace the cable (mini-display port to display port cable). Then I thought it might be the display. But I bought a brand new UHD display (same type, Samsung LU28E510DS/ZA - again, which had been working for more than a year). And the new display does the same thing. One interesting thing, when I look at the Intel(R) Iris(TM) Graphics 540 "Events" in the Device Manager, it shows a number of entries on 5/16/2018, including Device install requested, three services added (igfx, cphs, and cplspcon), and Device installed (atgh4627.inf_amd64...). While I don't know for sure, I think this is about the time frame that the issue started to appear. Any help would be appreciated! Thanks!