I am running a PTP slave where I start phc2sys and ptp4l with the following parameters:
phc2sys -d /dev/pps0 -s /dev/ptp0 -m -w ptp4l -f /etc/ptp4l_slave.conf -i eth0 -A /etc/ptp4l_slave.conf has the following in it: [global] twoStepFlag 1 verbose 1 time_stamping hardware slaveOnly 1 use_syslog 1 logging_level 6 summary_interval 2 I am seeing the following output constantly: phc2sys[202.208]: PPS is not in sync with PHC (0.113732439) phc2sys[203.208]: PPS is not in sync with PHC (0.113742830) phc2sys[204.208]: PPS is not in sync with PHC (0.113744232) phc2sys[205.208]: PPS is not in sync with PHC (0.113719010) ptp4l[206.096]: rms 110 max 152 freq +3080 +/- 82 delay 10856 +/- 9 ... I am also observing PPS signal from both the master and the slave on the scope and while they are synchronized, they are not in phase, in other words, they don't shift against each other, but one is offset relative to the other and this offset changes every time I reboot the slave. I suspect that this is related to "PPS is not in sync with PHC" message that I am seeing. I am running kernel 4.19.35. Is there something wrong with the way I am starting phc2sys and ptp4l? How do I get rid of "PPS is not in sync with PHC" messages? I googled for this message, but didn't find much out there. Thank you, Irene.
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