Well, before I give up I have to rule out the possibility that I may just be using a crappy USB hub, so I just ordered a powered USB 3.0 hub. My machine only has USB 2.0 but this hub that I just ordered uses a 4a adapter so I'm hoping it will provide the power that I need to give to this displaylink adapter. /
The new hub is supposed to give up to 900 mA but it may be a moot point, since the Sabrant uses a USB 2.0 cable which probably maxes out at 500 mA.
I don't know man, if this doesn't work then I may have to throw in the towel.