Hi Terry, > this makes us wait for up to 10 minutes before the system syncs, but > when it does the two clocks are exactly the same.
That's pretty lousy. It would be nice for the NTP server to know to trust the RTC and be happy to start serving it from the off. > The bad news is that I have got very unreliable timekeeping from the > realtime clock on the master Pi. Sometimes it appears to be keeping > time, sometimes it gains or loses several minutes in an hour. Start with a freshly downloaded Raspbian image, do the minimum required from the instructions to use the RTC, do not add NTP, etc. Just see if the RTC, the kernel, and userspace play well together over the hours and days. Then you'll know it's your tinkering that's the problem. It still smells like multiple parties are trying to adjust for creep. Did I ask this before? Why do the Pis need to be in sync, and to what accuracy? Do they need to know the actual time on the audience's wrists, or just be in agreement with each other that it's 15 minutes since they last gave us a twirl? Cheers, Ralph. -- Next meeting: Bournemouth, Tuesday, 2017-10-03 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ New thread: mailto:dorset@mailman.lug.org.uk / CHECK IF YOU'RE REPLYING Reporting bugs well: http://goo.gl/4Xue / TO THE LIST OR THE AUTHOR
