On Tue, Aug 18, 2020 at 12:34:55PM +0000, Irene Kravets wrote: > I'd still like to understand why I get synchronized 1PPS signals > (with 2 usec delay) when I run both ptp4l and phc2sys, but if I only > run ptp4l, the 1PPS signals are not synchronized? To clarify, with > only ptp4l running, the 1PPS signals from master and slave don't > drift relative to each other, but the delay between the signals is > totally random on each boot. However, if I run ptp4l and phc2sync, > the delay is always between 2 and 3 usec. Any ideas on why this is > happening?
I wouldn't expect a PPS output signal in either case. Normally you would have to enable the PPS output explicitly. Probably you are using a vendor kernel with the vendor's hacks? Or are you using an unaltered mainline Linux kernel? Thanks, Richard _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users