It turns out the controller is so low powered that it can only process ~30 shares per second which mean that unless diff is set higher, they work their way into a death spiral before diff catches up. Great...
(quoted from another thread)Is this a problem if one is using an S4 with solo.ckpool.org?
No. S4s work fine here.
As you know, if you monitor, I move my S3's (4.7 TH/s) here on Saturday and/or Sunday after we find at least 5 blocks on Slush. I had them hooked up this past Sunday for approximately 5 to 6 hours. Your pool connectivity works great with my S3's. I intend to choose either Saturday or Sunday to let them mine THE ENTIRE 24 hours after I get more miners in.
I believe you also know I've mentioned getting nothing but S4's from here on out when I buy more miners. However, you have me a little concerned about them. It sounds like they work fine on your pool. Did you have the opportunity to test them on Slush and see if they performed properly? I would rather use Bitmain BUT I do not want to be pissed off at Bitmain if they do not work on Slush as well as here. Am I safe getting them?
Your reply is appreciated greatly.