Re: [chrony-users] chrony (or I210) loses PHC refclock PPS signal?

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It's about 30cm long, with PPS and GND. For GND I used the pin on the I210. The cables are simple jumper cables unfortunateley, no shielding.

Am 29.03.2022 um 09:38 schrieb Miroslav Lichvar:
On Sat, Mar 26, 2022 at 09:59:52PM +0100, Fabian wrote:
I think I might have found the problem, but unsure on how to fix that.
In the room there is a fluorescent lamp, whenever someone switches on the
light, there is a chance the PPS input on the card will stop.

How long is the cable and is it electrically terminated?

I have seen the PPS timestamping on I210 to randomly stop working when
reconnecting between different GPS units. I suspect it happens when
the hardware gets multiple pulses too close to each other. I can
reproduce it by configuring the GPS with the CFG-TP5 command to
generate pulses at a very high rate.

There seem to be two different failure modes. With one it is sufficient
to restart chronyd, but the other one requires reloading of the driver.
I looked at the driver source code for any clues, but didn't see

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