I to have this problem. As soon as the computer goes to sleep I loose all DP monitors. But now I can’t even get them back. I’ve tried to restard/reboot by computer and the hub. Nothing. I’m using an NVidia Quadra 620 on WIndows 7.
It worked just fine when I plugged everything in the first time. It was a bit slow to return the monitors after the first sleep. Now i get NOTHING!