Raspberry Pi w/ 2 Block Erupters getting slow hashrate (~150 MH/s total)

[tlr]

I decided I should move my 2 ASICMiner Block Erupters off my power hungry desktop, where they were getting the advertised 330 MH/s (each), so I followed these instructions from Adafruit to get cgminer running on a RaspberryPi http://learn.adafruit.com/piminer-raspberry-pi-bitcoin-miner but my hashrate is now a horrible a ~150 MH/s

What's wrong? Does anyone else have a similar setup that's actually working properly?

Maybe a bad USB hub? I'm thinking about trying one of the Anker 10 ports, but it seems overkill for 2 Block Erupters.

Raspberry Pi too slow to keep up?

Just needs some tweaking?

Thanks.

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[bea]

Are you using cgminer 3.1.1?
Where are you reading your hashrate from? LCD screen via api or straight from the pool?

[ct1aic]

I decided I should move my 2 ASICMiner Block Erupters off my power hungry desktop, where they were getting the advertised 330 MH/s (each), so I followed these instructions from Adafruit to get cgminer running on a RaspberryPi http://learn.adafruit.com/piminer-raspberry-pi-bitcoin-miner but my hashrate is now a horrible a ~150 MH/s

What's wrong? Does anyone else have a similar setup that's actually working properly?

Maybe a bad USB hub? I'm thinking about trying one of the Anker 10 ports, but it seems overkill for 2 Block Erupters.

Raspberry Pi too slow to keep up?

Just needs some tweaking?

Thanks.

I also think the problem is with the HUB and/or power supply of the HUB. There are reports of 10 USB Block Erupters controlled by a RPI, working with no problems. There are also reports of problems with USB 3.0  HUB's.

I'm using a RPI 256 MBytes, with MinePeon, hashing @ 336 MH/s each, for 1 month, with no problems. I'm using a 7 ports HUB 2.0 bought @ China, but with a power supply with 5V/3Amp. The original power supply included with the HUB was only 1Amp.

Link for my HUB: http://www.ebay.co.uk/itm/230976716952?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649

[tlr]

I'm using cgminer 3.3.0. I tried compiling 3.1.1 but it wasn't working for some reason. I'll try again.

I'm using the same hub suggested in the PiMiner Adafruit tutorial (Manhattan something or other).

I tried plugging it in my desktop and it ran just fine, but perhaps the desktop USB port is providing additional power?

EDIT: I got 3.1.1 running, and it appears to be working correctly (660 MH/s total). Not sure what's wrong with 3.3.0.

[Aajo]

I'm using cgminer 3.3.0. I tried compiling 3.1.1 but it wasn't working for some reason. I'll try again.

cgminer version is the problem

https://bitcointalk.org/index.php?topic=223573.msg2453229#msg2453229

[tlr]

I'm using cgminer 3.3.0. I tried compiling 3.1.1 but it wasn't working for some reason. I'll try again.

cgminer version is the problem

https://bitcointalk.org/index.php?topic=223573.msg2453229#msg2453229

Yup, 3.1.1 works fine. Thanks.