On or around February the 17th this year, my previously consistent pool score went haywire. It was reported by someone else here in this mailing list post:
My stratum 1 time server is a Raspberry Pi 3 with a U-Blox MAX-M8Q hat, serving time with GPSD and Chrony. I have tried NTPsec and classic NTP, as well as different Pi boards and an Odroid-C2 with no change in results. My pool graph is here:
My ISP here in the UK is Virgin Media and my router is a Superhub 3 (a rebadged Arris with Intel's stinky Puma chipset). In the same mailing list thread as above, someone notes that the problem may be with NTT, Virgin Media's upstream provider. I've tried everything I can think of and can only assume that the problem is out of my hands.
Can anyone offer insight, suggestions, help, or anything to solve a problem that has essentially kept me out of the pool for five months?