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Date: Sat, 22 Apr 2006 11:26:12 -0700
From: Sam Leffler <sam@errno.com>
Organization: Errno Consulting
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To: =?ISO-8859-1?Q?Dag-Erling_Sm=F8rgrav?= <des@des.no>
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Cc: current@freebsd.org
Subject: Re: kern.hz=1000 causes random poweroff on laptop
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Dag-Erling Smørgrav wrote:
> Lars Fredriksen <lars@odin-corporation.com> writes:
>> I have a laptop sony z505rx, that if booted with kern.hz as 1000, will 
>> power off within a minute or two of booting.
> 
> sounds like overheating.

I've noticed on several of my laptops that they run way hotter with 
freebsd than other systems (linux, windows).  Most are newer models that 
have either acpi issues or lack speedstep support.  But I suspect 
there's something else going on in the basic system.  I find it hard to 
believe the clock rate is the cause of this extra work but haven't dug 
into it (I hoped judicious use of hwpmc would pinpoint what's going on).

	Sam