| Re: [chrony-users] PHC / NIC / PPS mismatch |
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- To: chrony-users@xxxxxxxxxxxxxxxxxxxx
- Subject: Re: [chrony-users] PHC / NIC / PPS mismatch
- From: Miroslav Lichvar <mlichvar@xxxxxxxxxx>
- Date: Mon, 22 Nov 2021 10:56:34 +0100
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On Wed, Nov 17, 2021 at 08:43:51PM -0800, Christopher Hoover wrote:
> Same config, except I have to change ,pin=0 to :pin=0 to get chrony
> to start. No bueno. Doesn't see the edge from the GPS.
,pin=0 never worked. The "extpps,pin=0" part was interpreted as a
single unknown option, which means the external timestamping feature
was disabled. It was a bug in the documentation that was fixed in
chrony-3.5. Also, the parser was reworked to check for unknown options
so issues like this wouldn't go unnoticed.
> Debian 10 / chrony 3.4-4+deb10u1 no pin / linux 4.19 => DOES NOT WORK
> Debian 10 / chrony 3.4-4+deb10u1 ,pin=0 / linux 4.19 => WORKS
> Debian 10 / chrony 3.4-4+deb10u1 ,pin=0 / linux 5.10.0 => WORKS
> Debian 11 / chrony 4.0 / linux 5.10.0 :pin=0 => DOES NOT WORK
> Debian 11 / chrony 4.0 / linux 5.10.0 no pin => DOES NOT WORK
I think that indicates extpps never worked. The refclock was used a
plain PHC refclock. But if it was not rejected as a falseticker, how it
was synchronized?
--
Miroslav Lichvar
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