[ntp:questions] Re: gps with atom driver, reach stays 0

Hal Murray hmurray at suespammers.org
Thu Aug 3 18:18:25 UTC 2006

>I have a GPS coupled to my pc. I verified that the kernel catches the PPS on the
>serial port and that it delivers them to ntpd.
>Why is it then that it stays like this:
>     remote           refid      st t when poll reach   delay   offset  jitter
>*GENERIC(0)      .DCFa.           0 l   43   64  377    0.000    3.229   6.323
> PPS(0)          .PPS.            0 l    -   64    0    0.000    0.000   0.001  <---

Do you have a prefer tag on one of your servers?

The atom driver doesn't know if the time is off by a multiple of seconds.
It plays dead until the prefer-ed driver is working and its time is close
to a PPS tick.

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