[ntp:questions] Re: Garmin GPS 18 firmware update -> 200ms offset

Ulrich Windl Ulrich.Windl at RZ.Uni-Regensburg.DE
Fri Nov 25 12:49:36 UTC 2005

Roman Mäder <newsXXF.10.rmaeder at spamgourmet.com> writes:

> I have been using a GARMIN GPS 18 LVC as my primary time source for several
> months and it has always been within a few ms of the external servers I
> configured for comparison (ntpq 4.2.0, Solaris 8). Yesterday i updated its
> firmware from 2.40 to 2.80 and now suddenly the offset is around -190ms,
> in fact it is so bad that the clock is flagged as a falseticker.


generally I would insist on having "change logs" or "release notes" before
installing a new firmware release.  Unfortunately companies don't give them
out these days. I could suggest that either the PPS signal has a different
polarity now, or the setting was just reverted to the firmware defaults after


> The configuration is
> server mode 2 prefer
> Does anybody have a clue what could cause this sudden offset? I did reload
> the old device configuration after the update. Anything that changed beyond
> what the list of changes
> (http://www.garmin.com/support/download_details.jsp?id=529)?
> Roman Maeder

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