| Re: [chrony-users] inquiry | unable to sync. with no-pps gps via sock |
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- To: chrony-users@xxxxxxxxxxxxxxxxxxxx
- Subject: Re: [chrony-users] inquiry | unable to sync. with no-pps gps via sock
- From: Miroslav Lichvar <mlichvar@xxxxxxxxxx>
- Date: Mon, 7 Mar 2022 11:04:31 +0100
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On Sat, Mar 05, 2022 at 04:45:44PM -0500, James Knight wrote:
> Trying to understand why when using a GPS (without PPS support; less
> than ideal) that the chronyd instance will not "synchronize"/talk when
> using the `SOCK` reference clock type. Using a setup of chronyd and
> gpsd, I can inspect that gpsd (via gpsmon) is receiving GPS
> information; however, a call to `chronyc sources` shows that no
> updates are getting through:
That's expected. gpsd sends over the SOCK socket only PPS-based
samples. If you don't have working PPS, gpsd will not write anything
there. There would need to be a separate socket for that. Mixing
message-based and PPS-based samples in one source wouldn't work well.
--
Miroslav Lichvar
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