So I got a kinda weird issue.
I started mining on my Raspberry Pi (O/S: Raspian) with 5 Block Eruptors on a DLink DUB-7 on August 19th using cgminer 3.3.4 and followed the included instructions on how to compile the libusb libraries myself. It worked great and it ran non-stop for a few weeks. The other day I decided to update cgminer to 3.4.2. After mining for about 20 minutes the Pi seemed to locked up. My SSH session died and I couldn't ping the Pi anymore. I figured it was just a fluke so I restarted the Pi but, again, after mining for about 20 minutes the Pi locks up.
I figured that this must have just been an issue with the newest version of cgminer so I went back to 3.3.4 with no luck. 3.3.4 now causes the Pi to lock up as well. I thought that maybe the Pi was overheating so I tried doing something else intensive; watching a 1080p movie over my LAN for 2hrs+ but it worked great and never locked up. I also tried mining just with 1 miner but the Pi still locked up.
Perhaps there is an issue with the newest packages for the Pi? How can I provide some more detailed info to see what is going on? Anything else I can try to resolve the issue?
If going back to the previous version doesn't resolve the issue, how can the new version be responsible?
I'm not saying the newest version is responsible for the issue. I was just describing what I've tried so far.
Perhaps there is an issue with the newest packages for the Pi
What I meant by this is maybe updating my Pi's firmware and packages are causing the issue.
When this happened to me I wasn't using that specific CGMiner but it would lock up Raspbian and I would have no recourse but to hard power cycle it. Eventually it happened so often I investigated. I tried new SD card as it kept corrupting mine. I tried newer versions of CGMiner. I finally upgraded Raspbian and tried using the over clocking and low and behold it wouldn't boot properly.
I don't know that this is your problem but for me I spent 30$ on SD cards (good ones) and a 15$ cable and new power supply fixed it. So if it was me I would double check that your power isn't getting saggy and causing errors. Mine worked for 4 months or so Flawlessly before I had problems.