[LinuxPPS] NMEA and NTP

Paul paul at lavender-fam.net
Mon May 31 23:01:45 CEST 2010


And while I have your attention has anyone tried adjusting the fudge2 in
the NMEA clock (using 2-4-6p1) I don't think it does anything anymore. I
am 200mS. out and by changing this fudge I ought to be able to remove
this (changing from assert to clear or vice-versa.

On Mon, 2010-05-31 at 20:00 +0100, Paul wrote:
> So some odd issues.
> 
> Lets start with a new one. I had both the NMEA with PPS and an external
> peer. As ntp started both were present in the peers list from ntpq. The
> offset was huge (this is a newly setup system) Then the GPS peers
> disappeared, only to reappear once the time had stepped to within 10mS
> or so. As though ntp believes another server (at about stratum 3) but
> not the NMEA when the offset is large.  With earlier experiments the
> time just will not step from a large offset using NMEA alone. Now it
> seems happier and is using the PPS so advertises itself as a Stratum 0
> Has anybody locked to the NMEA alone using the latest ntp?
> 
> I still don't understand the DNS not working for ntp
> 
> The drift file is still not being written to. I really don't understand
> this at all.
> 
> On Mon, 2010-05-31 at 19:43 +0200, Udo van den Heuvel wrote:
> > On 2010-05-31 19:41, Paul wrote:
> > > No I'm still very much at development. I compliled ntp from root and I
> > > am running it there.
> > > 
> > >> Is ntpd chrooted?
> > 
> > So then it should not be a libraries issue...
> > 
> > Udo
> > 
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