Clocks broken on Mac mini

Hal Murray hmurray at megapathdsl.net
Mon Jan 30 06:55:57 UTC 2017


Both Linux (Debian) and FreeBSD have the same problem.

The symptom is that the drift goes to 500 PPM and that isn't enough so every 
few minutes it steps the clock.

29 Jan 18:12:01 ntpd[568]: 0.0.0.0 c61c 0c clock_step +0.623666 s
29 Jan 18:17:13 ntpd[568]: 0.0.0.0 c61c 0c clock_step +0.636564 s
29 Jan 18:22:23 ntpd[568]: 0.0.0.0 c61c 0c clock_step +0.717096 s
29 Jan 18:27:34 ntpd[568]: 0.0.0.0 c61c 0c clock_step +0.400740 s
29 Jan 18:33:45 ntpd[568]: 0.0.0.0 c61c 0c clock_step +0.718885 s
29 Jan 18:40:19 ntpd[568]: 0.0.0.0 c61c 0c clock_step +0.684023 s
29 Jan 18:48:24 ntpd[568]: 0.0.0.0 c61c 0c clock_step +0.648540 s
29 Jan 18:54:27 ntpd[568]: 0.0.0.0 c61c 0c clock_step +1.218112 s

I disabled ntp and let it run for a while.  I estimated 2500 ppm.

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