I have a strange issue happening with my SP20....after running for a 4-6 hours, cgminer will crash, and I will not be able to log into the unit with the usual username/password. The logon screen get stuck on the prompt after I enter the creds and press enter. It never locks me out, or goes to the Unauthorized page, just continues to ask for the username and password. I can ping the device.
The only fix is to remove the SD card, reimage, and reboot (My sp20 doesn't fare so well unless running off an SD card)
Has anyone had a similar problem? This has almost become a daily occurrence, and is very annoying.