I've been running my 2PAC on a Raspberry Pi 3 but decided to invest in a powered USB hub. I have connected a HDD to the hub (it works fine) but cgminer is unable to find my 2PAC when it's connected to the hub. When I plug the 2PAC into the Rasp's USB ports, it's OK. How do I get cgminer to find the 2PAC plugged into the hub? Thanks!