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From: John Baldwin <jhb@freebsd.org>
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	(bigwig.baldwin.cx); Thu, 21 Jul 2011 13:48:19 -0400 (EDT)
Cc: Callum Gibson <callumgibson@optusnet.com.au>, freebsd-stable@freebsd.org,
	Jung-uk Kim <jkim@freebsd.org>
Subject: Re: powernow regression in 8-STABLE
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On Wednesday, July 20, 2011 10:28:19 pm Callum Gibson wrote:
> On 20Jul11 19:28, Jung-uk Kim wrote:
> }From your dmesg output, I see that the processor speed was not 
> }calibrated properly.  ML-40's max. core freq. is 2,200 MHz according 
> }to its specification but it was probed at 2,282 MHz, which is too 
> }high.  I think that's the problem.  Can you please try the attached 
> }patch?
> 
> Yes, I have seen core freq wobble around for most of the time I've owned it,
> but usually close to 2200.

Possibly try disabling legacy USB in your BIOS as a test?

-- 
John Baldwin