From owner-freebsd-mobile@FreeBSD.ORG  Fri Jan 16 13:36:57 2004
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To: sebastian ssmoller <sebastian.ssmoller@web.de>
In-Reply-To: Message from sebastian ssmoller <sebastian.ssmoller@web.de> 
	<1074283999.907.9.camel@tyrael.linnet> 
Date: Fri, 16 Jan 2004 13:36:54 -0800
From: "Kevin Oberman" <oberman@es.net>
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cc: freebsd-mobile@freebsd.org
Subject: Re: hw.acpi.cpu.economy_speed 
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> From: sebastian ssmoller <sebastian.ssmoller@web.de>
> Date: Fri, 16 Jan 2004 21:13:19 +0100
> Sender: owner-freebsd-mobile@freebsd.org
> 
> hi,
> i noticed that this sysctl flag is not longer supported. what should one
> use instead to handle different cpu speed when running battery ?

Use hw.acpi.cpu.thottle_state is the thing. It may be set to a value
between 1 and hw.acpi.cpu.throttle_max where throttle_max is full speed.

If you have a Centrino or P4-M, you can also save power by use of
hw.acpi.cpu.cx_lowest. It can be set to 0-2 which enables "deeper sleep"
when the system is idle. Not all states are available on all
systems. The higher values will result in a longer time to wake up after
the CPU becomes idle, but will use less power.

Both of these have values in /etc/defaults/rc.conf, but I don't think
Nate has hooked those up, yet. At the moment you need to set them
manually.
-- 
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