| Re: [chrony-users] GPS time |
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On Sat, Jun 29, 2019 at 10:49:22AM -0400, Steve Summit wrote:
> I suspect that the ensemble of NMEA strings generated by the
> simulator (currently just $GPGGA and $GPZDA) may be incomplete
> as far as chrony is concerned. So my specific questions are:
>
> * Is there a list of NMEA sentences (and fields) which chrony requires?
chronyd doesn't work with NMEA. That's the job of gpsd, which uses the
SHM or SOCK protocol to feed chronyd with samples.
> * Is there any logging or other debugging I can enable to find
> out exactly why chrony is rejecting the simulated GPS feed?
You can build chronyd with the --enable-debug option and then start
chronyd with two -d options. There should be a message explaining why
the samples from gpsd are dropped (if they are received at all).
--
Miroslav Lichvar
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