[LinuxPPS] Kernel configuration and more ......

[Udo van den Heuvel]

Udo van den Heuvel wrote:
> Paul wrote:
>> this. I then tried to use NTP (with the ATOM clock). No events were
>> seen. So then I did cat /dev/ttyS0& (and left the process in the
>> background) and then NTP saw the events and the PPS started to be used
>> (but see below). Why? Why doesn't NTP open the port itself?
> 
> ATOM not opening a port and thus not seeing events by itself (I use ATOM
> together with NMEA) is a problem I guess.

So I commented out my NMEA driver in ntp.conf and restarted ntpd.
No PPS was seen for the duration of the test. (long enough for kernel
sync and thus ATOM / PPS to be locked to external timestamps)

Can anyone confirm these findings?