From mboxrd@z Thu Jan 1 00:00:00 1970 From: Erik Slagter Subject: RE: [PATCH] amd76x_pm: C3 powersaving for AMD K7 Date: Fri, 03 Feb 2006 10:21:41 +0100 Message-ID: <1138958502.18273.1.camel@localhost.localdomain> References: Mime-Version: 1.0 Content-Type: multipart/signed; micalg=sha1; protocol="application/x-pkcs7-signature"; boundary="=-88PNrsP3SWt1mSlniOV5" Return-path: Received: from erik-slagter.demon.nl ([83.161.107.130]:2717 "EHLO artemis.slagter.name") by vger.kernel.org with ESMTP id S932169AbWBCJWE (ORCPT ); Fri, 3 Feb 2006 04:22:04 -0500 Received: from skylla.slagter.name (skylla.slagter.name [172.31.4.2]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "skylla.slagter.name", Issuer "CA Cert Signing Authority" (verified OK)) by artemis.slagter.name (Postfix) with ESMTP id CFE4F1A34004 for ; Fri, 3 Feb 2006 10:21:48 +0100 (CET) In-Reply-To: Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: linux-acpi@vger.kernel.org --=-88PNrsP3SWt1mSlniOV5 Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Wed, 2006-02-01 at 20:35 -0500, Brown, Len wrote: > Re: bad timing > If the BIOS advertises C2 latency > 100usec, then the BIOS > and the system do not support C2. > If the BIOS advertises C3 latency > 1000usec, then the BIOS > and the system do not support C3. > This isn't just a suggestion, it is the standard method > that the spec provides the BIOS to tell the OS to NOT USE these states. Isn't there any other way to tell the operating system that the C2/C3 states are unusable (e.g. by simply telling they're not there?). 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