Re: gpsd losing connection to ublox

[Gary E. Miller]

Yo Niall!

On Wed, 17 Nov 2021 20:24:39 -0800
Niall Parker <stuff@npengineering.ca> wrote:

> On 2021-11-17 7:21 p.m., Gary E. Miller wrote:
> > [..]
> > I do see this in the tmp3.log:
> >
> > gpsd:PROG: gpsd_multipoll(5) DEVICE_UNCHANGED for 11
> >
> > That is talking about fd=5, which is your tty.  That is not right,
> > so I'll dig at that.  
> 
> So DEVICE_UNCHANGED is indication the tty stopped for at least 5
> seconds ?

Sort of, more likely a gpsd bug since data is obviously flowing.

> While the error seems to still happen when speed is fixed the 
> consequences aren't so bad when gpsd doesn't start autobauding.

Yup.

> Feels like the best test to see whether a GPS hw problem or serial 
> driver problem would be to tee the serial TX off to another port and 
> watch ... unfortunately the system is remote, will have to see what I 
> can arrange. Open to any other ideas ...

Nah, I'm pretty sure that is a new bug from the reconnect code.

> In the meantime I need to figure out why the client nodes won't synch
> to the timeserver node (despite open firewalls and all restrictions
> removed in ntp.conf). Unfortunately the ntpsec listserver isn't as
> responsive as the gpsd one, still waiting on subscription request ...

Yes, that has been a problem recently.  Feel free to ask NTPsec
questions here, many of the same people from there are also here.

The key debug item is what your ntpmon shows.


RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
        gem@rellim.com  Tel:+1 541 382 8588

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    "If you can't measure it, you can't improve it." - Lord Kelvin

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