On Fri, Feb 25, 2022 at 09:18:14AM +0100, Nils Fürste wrote:
 
> I attached some more detailed info. Any ideas what it can be or how I can
> debug this problem? Any advice is appreciated! Thanks in advance!

Look at the three call sites of:

        port_dispatch(p, EV_SYNCHRONIZATION_FAULT, 0);

> Client debug output: https://pastebin.com/D2f56EYN

There is a bunch of stuff in there NOT in mainline linuxptp:

ptp4l[14873.252]: US_TUNING_FREQ_COARSE
ptp4l[14873.252]: localdiff/freq_est_interval  1/10
ptp4l[14873.253]: t5-t1  1000035500 
ptp4l[14873.253]: t6-t2  1000035490 
ptp4l[14873.253]: ratio       +1 
ptp4l[14873.253]: freq       -10 
ptp4l[14873.253]: share_lock_status 0

I guess you hacked the servo, it returns SERVO_UNLOCKED inappropriately.

HTH,
Richard


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