i386/104867: Clock running at 2x speed of wall clock
Bruce Cran
bruce at cran.org.uk
Fri May 9 21:40:03 UTC 2008
The following reply was made to PR i386/104867; it has been noted by GNATS.
From: Bruce Cran <bruce at cran.org.uk>
To: bug-followup at FreeBSD.org, Jeff at PointHere.net
Cc:
Subject: Re: i386/104867: Clock running at 2x speed of wall clock
Date: Fri, 09 May 2008 22:31:29 +0100
Could you check which timecounter is being used, with the
kern.timecounter.hardware sysctl? The ACPI-safe source is known to run
far too fast on many systems, and it's better to use i8254 instead: try
putting the following in /etc/sysctl.conf and rebooting
kern.timecounter.hardware=i8254
If the clock is still running slightly fast (e.g. 1s per minute) then
you can configure ntpd to track and correct the drift. There's a guide
to setting it up in the handbook at
http://www.freebsd.org/doc/en/books/handbook/network-ntp.html
--
Bruce Cran
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