Laszlo, Have you tried choosing between your different available clock sources and letting NTP run for a few days and log the stats?
Check: /sys/devices/system/clocksource/clocksource0/ available_clocksource & current_clocksource _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.