Does it run stable at 4 GH/s? Or is it getting down slowly until it goes zombie?
What power supply does the usb hub have?
Seems like you could read my mind. Yes, it starts at ~4-5 GH/s and slows down until it goes zombie... like, literally halt at 0 GH/s if you leave it on for "too long". It happened regardless if I had it on a 2.0 or 3.0 USB port, but I used to explain to to myself as the USB port not having enough power to pull better numbers.
As for the power supply, the hub is having an external power cable and is said to deliver 1.5 A on 3 charging ports. Additionally, it is the only thing plugged into the USB port at this moment.
And did you read the first post, and are you using the correct build of cgminer?
I did read the first post, and the only thing I can guess I'm missing out on is the "-p x --suggest-diff 32". However, the instructions didn't have that line listed.
As for build, then I am using the one recommended on the A4 instruction sheet that came with the stick miner.