Quote from: frazier34567a on April 20, 2018, 03:13:14 PM

Quote from: philipma1957 on February 04, 2018, 02:51:23 PM

Quote from: blockchain49er on February 04, 2018, 02:48:57 PM

Quote from: jstefanop on January 31, 2018, 07:25:00 PM

Quote from: blockchain49er on January 31, 2018, 01:20:50 AM

I ordered 2 Moonlander 2 and have them hashing. The problem is that no matter what I do one of the sticks have an error rate of 5-10%. I've tried modifying clock settings, different USB ports, different computers, powered USB hubs, etc.

One stick is <.5% error rate and the other is 5-10% consistently. I've gone as low at 600MHz and as high as 796 each with similar results.

I've purchased directly from the developer on eBay. Not sure if I have a defective unit or I need to tweak the pots maybe?

Interested to hear any ideas on how to troubleshoot this.

Try raising the memory and core voltage. Also some units do show higher error rate, but does not actually affect the hashrate (i.e. the uart controller sometimes spits out garbage, but all the "real" shares still come out properly). Are you also seeing a corresponding 5-10% drop in hashrate?

So the plot thickens (well not really... I think I just have a bad device).

These devices shipped with the following voltages Core: 0.714VDC Mem: 0.771VDC. I changed them to their supposed defaults listed in the first post and was able to get it to Core: 0.751 Mem: 0.854. Now the error rate is consistent with the other 2 devices, except I constantly get these errors after a few hours:

[2018-02-03 10:45:24] FutureBit Write error: Permission denied
[2018-02-03 10:45:24] MLD 1: ASIC has stopped hashing, attempting to restart
[2018-02-03 10:45:24] FutureBit Write error: Permission denied

I've dropped the frequency from 756 (where the others are running happily) to 600 and all steps in between. I've been troubleshooting this for days and keep ending with the same result no matter which USB port or hub I use. I've run this thing solo, with the other two, basically every combination I've tried gets these errors.

Not sure what else to try at this point.

what hub and what pc or rasp pi?

I want to stress that my setup is at 832 and just runs and runs and runs and runs

https://www.youtube.com/watch?v=d3rqTUNt5XI

I am having the same issue, was there ever a solution?

Code:

[2018-02-03 10:45:24] FutureBit Write error: Permission denied

This error is because the miner temporarily lost contact with the USB port, this happens on cheaper hubs...especially if you have the sticks vertical mounted. The vibrations from the fans can cause the port to lose contact with the pins inside the USB connector. Unfortunately a USB disconnect is not recoverable and it would need to be unplugged/replugged.