From owner-freebsd-questions@FreeBSD.ORG  Sun Aug 13 01:40:44 2006
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Date: Sun, 13 Aug 2006 02:40:39 +0100
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Subject: Re: Bad system clock
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On Saturday 12 August 2006 12:42, P.U.Kruppa wrote:
> Hi,
>
> for some time now my system clock really goes wrong (some hours
> per day). Is there some simple way to find out if this is caused
> by a hardware or software problem?

Does this help?

http://www.freebsd.org/doc/en_US.ISO8859-1/books/faq/troubleshoot.html#LAPTOP-CLOCK-SKEW