I built the raspberry pi/ASIC Block Erupter as recently in the news for fun. And was able to mine for a good week. Then all of a sudden my hashrate was that of just one USB Erupter per my mining pool's stats (the Pi's LCD though is saying that I'm averaging 1.3 GH/sec as promised.)

I've tried changing pools. Re-Booting. Update/Upgrade even - nothing. The unit spins up to the 1.3 GH/sec on both the LCD and the mining pool's stats - but will then degrade to <300 (again via the mining pools and not the LCD.)

Anyone seen this behavior in their setup? I haven't made any changes that I can think of. The four sticks light up solid when the Pi's off and then when they are mining blink as before. Again the Pi's LCD readout is saying all's a-ok, it's just the pool(s) that is giving me the bad news.

Any thoughts would be greatly appreciated. Thanks.

UPDATE: After testing each item (changing out one thing at a time) I think the problem was the USB power to the Pi. I used the USB power adapter I got from Adafruit and changed it out with one from my iPhone (had it on me). After repeated switching of these two - I'm now sure that the Pi just wasn't getting the power it needed - resulting in the odd behavior. Everything else stayed constant when tested.