nanofury NF1 doesn't like USB hubs

[mike_980]

I have a nanofury NF1 and have been running it quite successfully through my laptop for a few weeks. I also have one of the 335MH/s block erupters too so thought i would try them with a USB hub. I have a cheap 10 port powered hub I thought I would try and sure enough the nanofury didn't like this (not ample power supply once the fan and block erupter were added). So I bought a Plugable USB3 7 port hub which has a 4 amp power supply.

It seems to run fine for about 10 minutes through this hub but then does the same as my cheap hub and just starts giving errors. BFGminer just repeatedly flashes something like "NFY-old-buf - giving up after 4 tries" or something like that but I can't remember the exact phrase.

Heat is not an issue as there is a fan blowing over the setup and the ASICS don't even get warm. any suggestions?

[1714099574]

1714099574

[1714099574]

1714099574

[1714099574]

1714099574

[1714099574]

1714099574

[1714099574]

1714099574

[mike_980]

could this be some kind of driver issue or something?

when on the usb port it will run no issues at 2.7gh/s but even turning it right down to 2gh/s on the hub doesn't help?

[mike_980]

This is the problem i am getting. I have just tried the pencil mod to see if it helps, but why would it work fine though the laptop then only give the problem when plugged into the hub?

https://scontent-a-lhr.xx.fbcdn.net/hphotos-ash3/1479239_10202154809285512_151581123_n.jpg