Re: [gpsd-users] syslog error message with new version - kernel PPS failed Connection timed out

[hans mayer]

Yo Garry,

> Odd, the source for pps-ktimer says it is a client, not a source.

It's a client as it has no own time source. It takes the
kernel time to generate the 1PPS information.

> But is does seem to be a test source.

Of course, nothing serious, just for testing.

> And how exactly did you try it?

This is the way I try to use gpsd ( without success ) with
the PPS signal of gps-hardware with pps-gpio" kernal module.

gpsd -n -F /var/run/gpsd.sock -P /var/run/gpsd.pid /dev/ttyS2 /dev/pps0

For test reasons in combination with pps-ktimer I tried this:

gpsd -n -F /var/run/gpsd.sock -P /var/run/gpsd.pid /dev/ttyS2 /dev/pps1

Because I have seen that pps-ktimer generates this device /dev/pps1

And this is the syslog:

Aug 18 21:14:37 gps0 kernel: [343435.561377] pps_ldisc: PPS line 
discipline registered
Aug 18 21:14:37 gps0 kernel: [343435.572084] pps pps2: new PPS source 
serial2
Aug 18 21:14:37 gps0 kernel: [343435.580213] pps pps2: source 
"/dev/ttyS2" added
Aug 18 21:14:37 gps0 gpsd[29883]: gpsd:ERROR: KPPS:/dev/ttyS2 kernel PPS 
failed Interrupted system call
Aug 18 21:14:37 gps0 gpsd[29883]: gpsd:ERROR: KPPS:/dev/pps1 kernel PPS 
failed Interrupted system call
Aug 18 21:14:37 gps0 gpsd[29883]: gpsd:ERROR: KPPS:/dev/ttyS2 kernel PPS 
failed Interrupted system call
Aug 18 21:14:37 gps0 gpsd[29883]: gpsd:ERROR: KPPS:/dev/pps1 kernel PPS 
failed Interrupted system call
Aug 18 21:14:37 gps0 gpsd[29883]: gpsd:ERROR: KPPS:/dev/ttyS2 kernel PPS 
failed Interrupted system call
Aug 18 21:14:40 gps0 gpsd[29883]: gpsd:ERROR: KPPS:/dev/ttyS2 kernel PPS 
failed Connection timed out
Aug 18 21:14:43 gps0 gpsd[29883]: gpsd:ERROR: KPPS:/dev/ttyS2 kernel PPS 
failed Connection timed out
Aug 18 21:14:46 gps0 gpsd[29883]: gpsd:ERROR: KPPS:/dev/ttyS2 kernel PPS 
failed Connection timed out


I tried to figure out if there is maybe an issue with
this "pps-gpio" module. But the errors are the same.

Has this warning any relevance for general functionality
gpsd:WARN: KPPS:/dev/pps0 missing PPS_CAPTURECLEAR, pulse may be offset


Kind regards
Hans

--



Am 18.08.2015 19:19, schrieb Gary E. Miller:
> Yo hans!
>
> On Mon, 17 Aug 2015 21:24:42 +0200
> hans mayer <address@hidden> wrote:
>
> > I load module "pps-ktimer". I am sure you know it.
>
> Nope, never heard of it, but I do see it in the kernel.
>
> > It generates also a 1PPS signal, but free running without
> > any hardware clock.
>
> Odd, the source for pps-ktimer says it is a client, not a source.
> But is does seem to be a test source.
>
> > Next I tried to use /dev/pps1  for "gpsd".
>
> And how exactly did you try it?  Without your command I can not
> duplicate.
>
> > But here I run into the same issue as with the other kernel module.
> > It results in this error: kernel PPS failed Interrupted system call
>
> Way too many variables here.  I do not see any use for pps-ktimer as
> it applies to gpsd.
>
> RGDS
> GARY
> ---------------------------------------------------------------------------
> Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
>         address@hidden  Tel:+1(541)382-8588