Quote from: btcmonkey on July 02, 2013, 03:14:37 AM

Hello,
On my Raspberry Pi I am having the issue described here (describing the same issue in Ubuntu 12.04LTS):

http://bitcoin.stackexchange.com/questions/11829/bitcoin-erupters-not-stable-on-ubuntu-and-cgminer-3-3

Basically in 3.3.1 (or 3.2.1, 3.2.0) with 1 USB AsicMiner Erupter, on a USB2.0 hub all is good hashing around 333MHs stable. If I add a second stick (or more) hashrate jumps all around with all chips eventually getting SICK and restarting. Built following instructions and verifying prereqs.

I'm rebuilding an Ubuntu box to try to reproduce there.

Any tips on something I may be doing wrong or ideas on the problem?

Only cgminer 3.1.1 is stable with that hardware, using the old serial usb interface. We moved to a new driver model from 3.2.0+ for this sort of hardware and it has proved problematic for this hardware when multiple are in use. Oh and we do update our code a LOT, it's just that we hit a snag with this hardware and the new driver model and have as yet been unable to resolve it.