> From:
address@hidden
> Date: Tue, 8 Nov 2011 13:02:25 +0000
> Subject: Re: [gpsd-users] Help with extracting time information from GPS to NTPD
> To:
address@hidden
> CC:
address@hidden>
> On Tue, Nov 8, 2011 at 10:21, Jordan <
address@hidden> wrote:
> > However I can't quite figure out how to get ntpd to pull the information
> > from gpsd. I've modified my /etc/ntp.conf to:
> >
> > Code:
> >
> > server 127.127.28.0 minpoll 4 maxpoll 4
> > fudge 127.127.28.0 refid GPS
> >
> > restrict 127.0.0.1
> > restrict 10.1.1.0 mask 255.255.255.0 nomodify notrap
> >
> > where 127.127.28.0 is supposed to be the IP to access the GPS information. I
> > can ping that IP successfully. However when I try to access the server using
> > ntpq -p, it says 'No association ID's returned'.
>
> My bet is your ntpd was compiled with options that left out the SHM
> refclock driver (or all refclocks). There should be a message from
> ntpd in syslog hinting as much.
>
> > If I stop NTPD and run 'ntpdate 127.127.28.0' it says there were no suitable
> > synchronization servers found.
>
> That's not really an IP address. 127.*.*.* are all localhost, which
> is why you can ping it. ntpd special-cases 127.127.d.u to refer to
> reference clock driver number d, unit number u. Only within ntpd do
> those IPs refer to reference clocks.
>
> Cheers,
> Dave Hart