What HUB you use? What show lsusb on you raspberry ?
I had the issue that the plug was not put is tight to the hub.
I had the issue that the plug was not put is tight to the hub.
Im using https://www.amazon.com/Plugable-port-USB-3-0-hub/dp/B008ZGKWQI and have tried all ports on it.
http://i67.tinypic.com/16m22y0.jpg
Please go to you shell and execute "lsusb" with connected and aktiv hub and past the output here.
Did you do in the setup the following commands?
sudo apt-get update
sudo apt.get upgrade
sudo rpi-update
Thanks