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Subject: Re: Laptops with SpeedStep technology.
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Steffen Persvold <sp@scali.com>
Cc: linux-kernel@vger.kernel.org
In-Reply-To: <Pine.LNX.4.44.0208291004550.1952-100000@sp-laptop.isdn.scali.no>
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Date: 29 Aug 2002 11:29:02 +0100
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On Thu, 2002-08-29 at 09:13, Steffen Persvold wrote:
> Hi all,
> 
> Recently I got myself a Dell Inspiron 8200 with a Intel P4 Mobile wich has 
> SpeedStep technology. With power plugged in, this processor runs at 1.6 
> GHz and with battery only, 1.2 GHz. However I've found that the 
> /proc/cpuinfo doesn't show this and I was wondering if there were some 
> patches lying around before I began to look at this on my own.

cpufre handles this including switching processor speeds, fixing up
udelay and ensuring you dont get stuck at random boot speed

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