Quote from: ppumkin on January 07, 2015, 10:56:47 PM

Quote from: dogie on January 07, 2015, 10:40:03 PM

Quote from: ppumkin on January 07, 2015, 10:28:49 PM

Quote from: Visvas on January 07, 2015, 09:18:47 PM

Quote from: ppumkin on January 07, 2015, 07:52:19 PM

It must be the overclocking that crashes the firmware and you MUST hard reset the whole thing. I suppose if you want to get 70ghs out of these puppies then you need to be ready to fix them everyday or create something to cut USB power and +12v with some kind of MCU... I could do it but not worth it really.

No, its not overclocking. My two has zombied from day one, before i even tried anything other than default. And one of them has only given me 40-45 for the most part since i got it.
Due to the shipping cost of them however, it's not worth it to return it from here, i'll just make sure to warn people of the low quality of these.. Too bad, other than that, i kind of like these units.

Yea, mine just ZOMBIED on normal settings. Bugger it. I cant be asked going to pull the cables out and in every single fucking day just for this... but they are pretty sweet. I think i need to come up with something clever and automated... dont have enough time though.. sucks.
I might as well overclock them a bit since I have to to replug the fuckers every 24 hours any way.

Morning routine +replug U3's CHECK...

What type of hub are you on, powered or not powered? USB 3.0 or 2.0? There is also some newer firmware being tested which may fix some of the soft images, but zombie'ing is usually a brief interruption on USB.

USB 2.0 Direct into Motherboard USB Slots, NO Hub, and proper USB shielded USB cable.
U3 12V Powered from 450WATT, separate PSU.

It happens only after some hours and a brief interruption USB should just restart mining, for example. Pull out USB cable, ZOMBIE after 10 seconds, plug in USB cable, ZOMBIE goes away.

In this situation the only way to remove ZOMBIE is to hard power cycle the unit, becuase cgminer does not pickup the USB, or if it does it cannot communicate with it, which means the firmware shat a brick sideways.

If you can turn off USB somehow, then thats the key to hard cycle the U3. I just noticed even with 12volt plugged, the red light inside goes out. Also, I deliberatly sacrificed a USB cable and cut the 5V. I wanted to see if I could just turn the PSU on and OFF which would also power cycle MCU on the U3. But no.. that would be to easy. The MCU is powered by the USB +5 and the ASICS are powered by the 12volt line.

Please note these are Pure deductions by trial and error. I have not fried anything, yet. Phew.

A powered USB hub will likely help, as there is some power draw through the USB port. You're right that windows / firmware / whatever it is controlling the device to the OS / cgminer shouldn't behave like that, but it does. I am not sure which party in that has control over a potential remedy.