We have two laptops that are identical (Dell Latitude E7440), with 2 USB 3.0 ports, and two Dell 26" monitors.
Problem is that we cannot get the 3 displays to extend to each other. I can get only 1 external monitor, and 1 laptop to display correctly.
The “resolution” tool in Windows 7 Pro, shows 3 monitors, but when I click the “Identify” tool, it only identifies #1 and #3 (and missing #2).
I click the laptop-disconnect button in the Resolution tool, and monitor #2 still doesn’t display, and when I connect it back, laptop and 2nd monitor are cloned, but the monitor doesn’t display the full resolution.
We have 5 other laptops that work just fine, and all of our laptops are identically configured.