Hello,

I am currently using *chrony* (v4.0.8) on a RPi4. Due to my application, I
need to use only GPS, PPS and RTC for time keeping. The RTC is necessary to
preserve the time when GPS coverage drops or at boot when the GPS lock is
not immediate.

I have this current *chrony.conf *directives (other that standard ones)

*refclock PPS /dev/pps0 refid PPS trust lock GPS*
*refclock SHM 0 refid GPS precision 1e-1 offset 0.3 delay 0.2 noselect*
*rtcsync*
*rtconutc*

where  the first two are defining my sources and the second should take
care of the RTC. I would like to use the *rtcfile *directive to have chrony
to take care of everything but it seems that Rasbian Kernel is built
without support for RTC_UEI_ON.

Now I have the following problems, when I shutdown/reboot the RPi:


   1. it seems that chrony never selects the PPS source, and given that GPS
   is marked as noselect, I don't have any GPS timing
   2. any RTC support is outside chrony, but as said I would like to track
   it with chrony

I specify that chrony is run as daemon at startup with the -s flag

Any ideas?

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