[ntp:questions] pps breaks when nmea is enabled for ntpd

Richard Cagley rcagley at gmail.com
Sat Jun 15 01:03:40 UTC 2013

I have a TI DM8168 processor and a u-blox gps.

If I enable an internet server and pps, then pps works great

server clock.redhat.com iburst prefer minpoll 4 maxpoll 4
server minpoll 4 maxpoll 4
fudge flag3 1

However, if I add an NMEA server to my ntp.conf file like this

server mode 1
fudge flag1 1
server minpoll 4 maxpoll 4
fudge flag3 1

then pps stops working. I can kill ntpd and ppstest no longer works. It's
as though nmea is clobbering the serial port.

It sorta feels like this, but there was no resolution

Can anyone help me. I've really been struggling with this.

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