Mailinglist Archive: opensuse (1420 mails)

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Re: [opensuse] openSUSE + gpsd + PPS + NTP
  • From: Roger Oberholtzer <roger@xxxxxx>
  • Date: Wed, 15 Jan 2014 08:27:50 +0100
  • Message-id: <2140427.7MRJv8JL9D@acme>
On Tuesday, January 14, 2014 09:02:52 PM Cristian Rodríguez wrote:
El 14/01/14 05:51, Roger Oberholtzer escribió:
Our main question is how the system acts if, at boot, there is no GPS
data. Is the time left alone?

It uses the rtc time.

When the time does arrive, how quickly will the system

clock reflect the time?

It depends on the ntp client and server, it takes ntpd to settle from a
few minutes to several hours. If that's not desired, try NTP server
named "chrony" (the default ntp daemon in RHEL 7 and later) but it has
limited support for gps devices.

I looked at chrony a while back. It seems to be designed for systems that are
turned on and off alot. Like laptops. Or mobile systems such as ours. Opinion
is divided as to whether chrony is really needed as an alternative to ntp. I
think it depends on what your problem is.

Yours sincerely,

Roger Oberholtzer

Ramböll RST / Systems

Office: Int +46 10-615 60 20
Mobile: Int +46 70-815 1696

Ramböll Sverige AB
Krukmakargatan 21
P.O. Box 17009
SE-104 62 Stockholm, Sweden
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