It's connected directly to the back of the motherboard. No hubs. I'll try in another port. The weird part is that is turned on and the blinks like the mouse and other devices and it turns off and never comes back until the OS is actually booting.
Changing the port to the eSATA/USB did the trick for me, thanks!!!
I am glad it did the trick for you.
Having changed the screen hub to another USB port also made the difference between booting to clover or not, and solved my problem. So if you are stuck at the cursor move your USB devices around.
Still, for the sake of debugging I can tell i had in this screen hub a BT dongle, a logitech mouse dongle and a USB keyboard. And that now i have all those same things on still but the screen is connected to another USB port.