> On Thu, Nov 24, 2016 at 10:25:26AM +0100, Wielant, Ulrich wrote:
>> After chrony synchronized once to the PPS it never selects another time
>> source although the PPS/GPS signal might disappear. This might be the case
>> if gpsd is not running, the GPS is off or the GPS has no fix.
>> MS Name/IP address Stratum Poll Reach LastRx Last sample
>> #- GPS 0 4 0 21m +44ms[ +44ms] +/-
>> #* PPS 0 4 0 21m -1211ns[-2913ns] +/-
>> ^- ntp03.cc-netzwerk.de 3 8 377 47 -1809us[-1809us] +/-
>> ^- ts1.sct.de 2 8 377 55 -403us[ -403us] +/-
>> ^- news01.nierle.com 2 8 377 246 -1518us[-1518us] +/-
>> ^- xserv-01.tenretni.org 2 8 377 53 -4528us[-4528us] +/-
>> What do I have to do so that chrony no longer synchronizes to the non
>> available PPS/GPS source?
> Just wait a bit longer :). The PPS source was much better than the NTP
> servers, so it may take couple hours before chronyd assumes the clock has
> drifted so much that it should switch to the significantly worse NTP sources.
> It's a feature, not a bug. If chronyd switched immediately to another source,
> that would be bad for accuracy of the clock, e.g. when the GPS has a weak
> signal and PPS stops for couple of minutes at a time.
Is there a parameter so that chrony switches faster although it is bad for
>> I would also modify the stratum of the PPS/GPS source but this doesn't seem
>> to be possible with refclock sources. Correct?
> Right, there is currently no option to set stratum for refclocks. It wouldn't
> make much of a difference in the source selection anyway.
Is there an option so that common NTP servers are preferred and PPS/GPS is
taken only if there is no other server? This might sound strange (it is ;-))
but this is a requirement for my current project. GPS/PPS should be used as
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