UGH!!!    I really wish distros would provide software that is more up to
date.    Looks like it might have been gpsd.

On a whim I decided to scrap the repo provided gpsd AND chrony and compiled
everything myself.  it now appears as if everything is working.

chrony sources output:

210 Number of sources = 1
MS Name/IP address         Stratum Poll Reach LastRx Last sample

#* GPS                           0   4   377    17   +296us[ +347us] +/-

I am perfectly happy with 200ms error in time.   That more than suits my

Sorry for wasting everyone's time.    I was trying to save time and
frustration by using the repo supplied (and you would think tested)
binaries.   It would have been a lot quicker and less frustrating to just
compile.  lol.

On Mon, Aug 8, 2016 at 11:50 AM, Chris Greenman <>

> Ok,  Here are the latest strace files.  It looks like the chrony in the
> Jessie repos does not have debug compiled in.  I downloaded the latest
> source and compiled.  The trace is using that binary not the distro
> supplied (Ver. 1.30).  I should note that I already tried the fresh
> compiled version before and got the same results as the distro version.
> On Mon, Aug 8, 2016 at 9:19 AM, Miroslav Lichvar <>
> wrote:
>> On Mon, Aug 08, 2016 at 09:05:03AM -0400, Chris Greenman wrote:
>> > I didn't think the -F option was correct but it didn't seem to work
>> without
>> > it either.  I was just hunting and pecking.  My gps does not (directly)
>> > provide PPS.  It's a ublox 6 so I could probably wire it in but to be
>> > honest, I don't need that much precision.  For my needs NTP is accurate
>> > enough but it's not always available which is why I want time from GPS.
>> Note that GPS without PPS is typically less stable than NTP over
>> internet. Binary mode may work better than NMEA.
>> > As
>> > for the dependencies and starting order, that's easy to fix.  Right now
>> > gpsd is starting from init.d and chrony is starting from systemd.  I can
>> > just remove the rc#.d links and write a new .service file for gpsd with
>> > "After = chrony.service" and "Wanted by =".  Then verify
>> the
>> > chrony service file jives with the one for gpsd.
>> With SHM refclock that shouldn't be necessary. Only for SOCK chronyd
>> needs to be started first.
>> > The last gps strace I posted was with the -D 8 option specified.   I did
>> > not, however, specify -f to strace so it is not following after it
>> forks.
>> The -N option disables forking. Another useful option is -n, which
>> tells gpsd to not wait for clients, so SHM is always updated.
>> > As soon as I get some play time today I'll run some new traces.  Is
>> > attaching the best way to send the files or is there a bit bucket
>> somewhere
>> > I should use?
>> I think it's ok to post here if it's not too large (e.g. > 100KB). Or
>> you can compress it first.
>> --
>> Miroslav Lichvar
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