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Date: Tue, 4 Mar 2014 17:15:22 +0800
From: Erich Dollansky <erichsfreebsdlist@alogt.com>
To: mexas@bris.ac.uk
Subject: Re: ntp frequent time resets - battery dead?
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Hi,

On Tue, 04 Mar 2014 01:07:25 -0800 (PST)
Anton Shterenlikht <mexas@bris.ac.uk> wrote:

> 
> I see in /var/log/messages:
> 
> Mar  4 00:16:40 mech-anton240 ntpd[764]: time reset +0.291030 s
> Mar  4 00:38:02 mech-anton240 ntpd[764]: time reset +0.344745 s
> Mar  4 00:57:37 mech-anton240 ntpd[764]: time reset +0.338739 s
> Mar  4 01:19:45 mech-anton240 ntpd[764]: time reset +0.355020 s
> Mar  4 01:41:34 mech-anton240 ntpd[764]: time reset +0.365177 s
> Mar  4 01:58:41 mech-anton240 ntpd[764]: time reset +0.306982 s
> 
> and so on.
> 
> The correction seems large to me.
> Does this indicate that the battery is dead?

do you reboot between? If not, it is not the battery but the quartz
used by the clock.
> 
> This is on a Sun Blade 1500 silver desktop,
> about 10 years old.

This also can happen on new hardware. But it would be real rare. Did
you check for dirt in the PCB?

Erich