Re: [gpsd-users] gpsd-users Digest, Vol 63, Issue 12

[David J Taylor]

Hi Gary, Thanks for your reply. Unfortunately I am running older version of 
gpsd version 3.7 which does not have ntpshmmon utility. I also could not 
upgrade gpsd on my linux kernel version 3.3.8 (openwrt attitude adjustment 
distro). However I could get chrony to work properly with the same gpsd-3.7 
which indicates that gpsd is writing the information to the shared memory 
segment. While ntpd still cannot synch up with gpsd. Please let me know if 
you need any more information. Also how do I update system time using either 
using chronyd or ntpd ?

Regards,
Nagaraj
========================================

Nagaraj,

With ntpd, the system time should automatically update when the service is 
first started.  There are parameters which control the error allowed before 
the time is reset, but I've never had to alter the defaults.

Your ntpq -pn shows no connection to the outside servers, so perhaps there 
is a firewall issue?  I would suggest marking at least one of the external 
servers as "prefer", as the timing of the serial output from typical GPS 
units is sufficiently variable that NTP may refuse to accept it as a source.

Your NTP version is very old, and perhaps you should consider updating to 
the current 4.2.8p9 reference implementation:

 https://www.eecis.udel.edu/~ntp/ntp_spool/ntp4/ntp-4.2/ntp-4.2.8p9.tar.gz

Cheers,
David
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