From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andi Kleen Subject: Re: AMD Cool'n'Quiet Date: Mon, 2 Feb 2004 11:08:18 +0100 Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Message-ID: <20040202110818.011faac9.ak@suse.de> References: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Richard Smith Cc: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-acpi@vger.kernel.org On Mon, 2 Feb 2004 03:00:31 +0000 (GMT) Richard Smith wrote: > If I buy an AMD Athlon 64 CPU and an appropriate motherboard, will the > Cool'n'Quiet feature work on Linux? (This throttles down the CPU to > reduce power consumption when idle.) I know Windows requires special > drivers. Is it handled by ACPI on Linux? It's handled by an own cpufreq driver (powernow-k8) independent of ACPI and works. However it requires a correct PST table from the BIOS, which is often not there. You also need to run cpufreqd. -Andi ------------------------------------------------------- The SF.Net email is sponsored by EclipseCon 2004 Premiere Conference on Open Tools Development and Integration See the breadth of Eclipse activity. February 3-5 in Anaheim, CA. http://www.eclipsecon.org/osdn