Hello All, I've been going through this thread trying to see any similar issues to what I'm seeing with no luck so far.
I have just setup a new RaspberrPi3 with the latest Raspian image. I have been able to get the vthoang cgminer 4.10 setup and working, and with two(2) 2pac on a powered USB hub the SW launches and logs into my pool with no problems. I'm running at the default freq of 100 for now. After some amt of time, anywhere from 2-6hrs the Pi seems to crash and is unreachable. I'm not exactly sure where to start to see what kind of problem I'm running into. the Pi is running headless so there is no screen to look at. Any suggestions?
I have the same exact problem and haven't been able to narrow down the issue despite trying. Sometimes it lasts a few hours and other times 24+ hours. Then randomly the 2pacs stop blinking and the Pi cannot be reached via VNC Viewer or Putty and I have to pull/plug the power to get it running again. I know that is not an answer to your question but figured it wouldn't hurt to know you are not the only one to have this problem.
I may have caught it in the act earlier today when I saw the 2pacs all reducing their hashrate and going zombie but stopped it and restarted no problem. I should have let it play out to see if that was the issue but didn't think about it at the time.
Yes, this is pretty much exactly what is happening to me. Did you happen to be watching the hashrate at the time? I'm not sure how to troubleshoot it or where to start.