[ntp:questions] Re: PPS time sync

Ulrich Windl Ulrich.Windl at RZ.Uni-Regensburg.DE
Wed Aug 10 10:29:26 UTC 2005


"David L. Mills" <mills at udel.edu> writes:

> Reiner,
> 
> Take a peek at the timex.h header file. The 0400 bit reveals either the or
> PPS signal has severe frequency instability.

Or the system clock, of course...

Ulrich

> 
> Dave
> 
> Reiner Dassing wrote:
> 
> > Hello!
> > On ntp Version 4.2.0 and the patched Linux kernel for PPS (Kernel
> > 2.4.21-NANO) we use
> > the pps signal.
> > But from time to time ntp syslogs the following messages:
> > Jun 10 00:02:18 server ntpd[1038]: kernel time sync disabled 0507
> > Jun 10 00:03:12 server ntpd[1038]: pps sync disabled
> > Jun 10 00:03:24 server ntpd[1038]: kernel time sync enabled 0107
> > Can somebody explain me what might happen there.
> > Is there a bug in the driver?
> > Something wrong with pps signal?
> > Or can somebody point me the source to set some debug messages
> > to find out the reason?
> > Thank you very much for your help!
> > With best regards
> >  Reiner Dassing
> >




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