> Chris: > > Does indeed sound familiar to me here. > > I'm working also but with a slightly different fix. > > Not using PPS kernel patch as its difficult to add in to the RPM based > kernels here on Fedora Core 9 so I'm just using the shm driver and > plain old ntpd. My solution was to fudge the NMEA data time about 700 > ms here and now I'm also working with just ntpd and the shm driver > running and no gpsd. Running gpsd at all totally messes this thing up. > I don't have the time or energy to keep hacking at why, or the need to > be running gpsd actually it turns out-nothing else needs the data so > why run it-just another daemon to need to make sure its running. > > Relevant ntp.conf beloe and output: > > # LinuxPPS: GPS > server 127.127.20.0 minpoll 4 mode 1 > fudge 127.127.20.0 time1 0.700 flag2 0 flag3 1 > > # SHM: PPS filtered mean > server 127.127.28.0 minpoll 4 prefer > fudge 127.127.28.0 refid PPS flag2 0 flag3 1 > > # ntpq -p > remote refid st t when poll reach delay offset > jitter > ============================================================================== > +GPS_NMEA(0) .GPS. 0 l 5 16 377 0.000 25.349 > 9.221 > *SHM(0) .PPS. 0 l 14 16 377 0.000 2.953 > 0.176 > eagle-local 192.168.1.7 2 u 731 1024 377 0.160 -2.518 > 0.152 > apollo-local .STEP. 16 u 725 1024 376 0.236 -8.591 > 0.809 > -clock.trit.net 164.67.62.194 2 u 40 128 377 154.590 44.455 > 215.345 > +64.247.17.255 129.6.15.28 2 u 4 128 377 45.530 -13.520 > 252.661 > -kiri.nonexiste. 69.10.36.2 3 u 11 128 377 9.470 -12.775 > 1.132 > > -- > ===[George R. Kasica]=== +1 262 677 0766 > President +1 206 374 6482FAX > Netwrx Consulting Inc. Jackson, WI USAhttp://www.netwrx1.com > [email protected] > ICQ #12862186
George, understandable. To be honest, the only benefit gpsd brings is the ability to keep the clock synced if internet is lost and the clock drifts too far away from the pps driver's liking. Even though I have gpsd running, I quite possibly will switch back to shmpps. It seemed to be a little better at keeping time anyway. I'd really like to get LinuxPPS working though, because I can see it being slightly better at time keeping than the others. Chris _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
