For whatever it is worth: I had a lot of problems with Displaylink adapters connected to USB3 ports on Dell. What reduced the problem significantly, but not completely is the following: Look for anything under USB3 in Device manager, and where the option is available, disable power management. Same in the Start menu, look for the USB3 utility, on Dell usually Renesas, and disable power management.
To get the display going again, what I usually do until it works, is unplug, plug in the USB DIsplaylink device until it works again. Give it some time after re-plug in. And keep an eye on the notification area for any message saying device not recognised. If that happens, reboot.
I always get it going after a few times. Once the Displaylink icon is back in the system tray, you may have to again extend the monitors that do not dispay.
Karel
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