[ntp:questions] ntp drops gps/pps - lets time drift , solution: use 'true' in ntp.conf

Dave Hart davehart at gmail.com
Tue Aug 2 00:58:54 UTC 2011

On Tue, Aug 2, 2011 at 00:49 UTC, M Z <mcrunch2 at yahoo.com> wrote:
> Thanks for all the suggestions. I finally saw an ntp.conf configuration command
> option named 'true' which forces ntp to use the source no matter what.

Icky poo.  That's a nasty hack, and I advise others to spend the time
to figure out why their gpsd/SHM pps is being ruled a falseticker, and
fix it, rather than use the big hammer of "true".

In this case, "tos mindist 0.020" (20 msec instead of default 1 msec)
would probably cure the problem without resorting to "server ...
true".  See http://www.eecis.udel.edu/~mills/ntp/html/miscopt.html#tos

Dave Hart

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