[Linuxpps] my gps problem

[Folkert van Heusden]

Without the pps-module 7 minutes runtime:
keetweej:/lib/modules/2.6.16.18/kernel/drivers/pps# ntpq -c pe
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
xGPS_NMEA(0)     .GPS.            0 l    5   16  377    0.000  -161.26   2.085
-muur.intranet.v 131.188.3.223    2 u   38   64  176    0.001    7.190   4.288
-thegateap.intra 130.149.17.8     2 u   32   64  137    1.037  -20.314  28.631
+auth1.xs4all.nl 131.188.3.220    2 u   24   64  177    8.348   -0.861   9.326
+ntp1.nl.uu.net  .GPS.            1 u   28   64  177   25.742    8.673  18.984
+ntp3-rz.rrze.un .DCFp.           1 u   26   64  177   29.309    6.160  40.548
+ntps1-1.cs.tu-b .PPS.            1 u   88   64  176   29.087   -1.453  19.291
*ptbtime1.ptb.de .PTB.            1 u   27   64  177   23.271    0.704   7.365

quite a high jitter, as expected.

Now I loaded the pps_core module and restarted ntpd now in dmesg I get:

[42950050.600000] "pps_core":"pps"[82]: New message from PID 4337 (flags 0)
[42950050.600000] "pps_core":"pps"[242]: no PPS devices found

doesn't look good.
Does it (the module) need any parameters?


Folkert van Heusden

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