From owner-freebsd-mobile@FreeBSD.ORG  Mon Sep 26 02:49:17 2005
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To: Brian <kansascity_guy2005@yahoo.com>
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Date: Sun, 25 Sep 2005 19:49:08 -0700
From: "Kevin Oberman" <oberman@es.net>
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Cc: freebsd-mobile@freebsd.org
Subject: Re: Speed Steping hw.acpi.cpu.cx_support 
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> Does any one know how to config speed steping.
>  
> sysctl output > hw.acpi.cpu.cx_support:
>  C1/1 C2/1 C3/85
>  hw.acpi.cpu.cx_support C1
>  hw.acpi.cpu.cx_support 100.00% 0.00% 0.00%

Add th line:
performance_cx_lowest="LOW"
to /etc/rc.local. To get C3, you must run without USB drivers and, with the numbers you quoted, C2 is not going to buy you much.
-- 
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman@es.net			Phone: +1 510 486-8634