Yo Stuart! On Sun, 02 Nov 2025 05:25:50 -0500 Stuart Blake Tener <[email protected]> wrote:
> Instead of addressing each response I received thus far, I decided to
> aggregate my responses into a comprehensive discourse of what I tried
> to ascertain regarding the state of my system from a hardware and
> software perspective.
Fair enough. You could have saved your self a lot of trouble by
just sedning us the reseults of this run as root:
gpsdebuginfo
From here: https://gpsd.io/gpsdebuginfo
> 1) Checking gpsd for PPS support
>
> $ gpsd -h | grep -i pps
> PPS device, or a URL in one of the following forms:
> PPS
> # KPPS enabled.
Good. BTW, what gpsd version do you have installed?
> 2) Checking the kernel for PPS support
>
> /proc/config did not exist, but I used this trick to ostensibly
> ascertain the same information:
Yeah, almost never does.
> CONFIG_PPS_CLIENT_LDISC=m
Good.
> $ lsmod | grep -i pps
> pps_ldisc 16384 1
Good.
> 3) Using gpspipe to determine if PPS sentences or information is
> present over a 10 minute sample time.
>
> $ timeout 600s gpspipe -wP > /tmp/gpspipe
OK not really a good test of anything.
> 4) Execution of ntpshmmon over a 10 minute sample time
>
> $ timeout 600s sudo ntpshmmon
> ntpshmmon: version 3.25
> # Name Seen@ Clock Real
> L Prc
> sample NTP0 1761959885.903232834 1761952151.613393400
> 1761952151.570000000 0 -1
10 minutes and you just get one sample?? Do you have a calid 3D fix??
You should have gotten on a second. gpsd was running at the time?
> 5) Consulting the GD8200 documentation
>
> Succeeding a review and inspection of the GD8200 user manual, it
> stands demonstrative of a very basic amount of information regarding
> the GPS option for the laptop. However, it is conspicuously absent
> any discussion concerning the PPS capability whatsoever. I was also
> unable to locate a copy of any service manual or any other technical
> manuals beyond the user manual.
This is expected. They want you to pay extra to add the one wire for PPS.
>
> 6) Checking for device definition in /dev/
>
> $ ls -la /dev/pps*
> crw------- 1 root root 248, 0 Oct 31 16:09 /dev/pps0
>
> 7) Used ppswatch to conduct a test over a 60 second sample time
>
> $ timeout 60s sudo ppswatch -a /dev/pps0
> trying PPS source "/dev/pps0"
> found PPS source "/dev/pps0"
> time_pps_fetch() error -1 (Connection timed out)
Not good. Was gpsd running when you did that?
Of course the one test that I really wanted to see:
ppscheck /dev/ttyXXX
Where ttyXXX is your GPS, and gpsd is NOT runnong at that time.
I look forward to the gpsdebuginfo output.
RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
[email protected] Tel:+1 541 382 8588
Veritas liberabit vos. -- Quid est veritas?
"If you can't measure it, you can't improve it." - Lord Kelvin
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