Re: using gpsd + pps

[James Browning]

On Oct 31, 2025 16:35, Stuart Blake Tener wrote:

GPSD users, developers, et alia:

I have a General Dynamics GD8200 laptop that is inclusive of an internal GPS receiver. I was able to get GPSD running and cgps does show the satellites it sees, etc... However, I am a bit lost as to how to ascertain if I have pps capability and how to configure the software such that I can access it for setting the time on my laptop.

However, if indeed the GPS internal to my laptop does not have PPS capability, I am wondering if and how I can use the time within the GPS strings to set the clock in the laptop as well. I realize it is less accurate, but I am not doing anything transactional with the laptop so if it is 10 to 20 seconds behind every day I really not that concerned about it.

I am not sure if I am still a member of the list (I do not get daily or weekly emails) but I may have just disabled receiving them in the past.

Thanks in advance to everyone on the list for any guidance that may help me.

Crossposting because I'm insane. 

$ gpsd -h|grep -i pps

$ cat /proc/config*|grep -i pps

Those two commands should give you an idea if you have PPS support in gpsd and the Linux kernel; you should.

$ gpspipe -wP

Should tell you if/when gpsd is getting PPS.

The eevil one (gpsmon) should report such signals.

TLDR: You probably have support in gpsd and the kernel, but unless you have a spendier part, it probably doesn't grant PPS.