From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263032AbVG3KJM (ORCPT ); Sat, 30 Jul 2005 06:09:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263034AbVG3KJM (ORCPT ); Sat, 30 Jul 2005 06:09:12 -0400 Received: from gprs189-60.eurotel.cz ([160.218.189.60]:9149 "EHLO amd.ucw.cz") by vger.kernel.org with ESMTP id S263032AbVG3KJI (ORCPT ); Sat, 30 Jul 2005 06:09:08 -0400 Date: Sat, 30 Jul 2005 12:06:58 +0200 From: Pavel Machek To: Marc Ballarin Cc: linux-kernel@vger.kernel.org Subject: Re: Power consumption HZ100, HZ250, HZ1000: new numbers Message-ID: <20050730100658.GB1942@elf.ucw.cz> References: <20050730004924.087a7630.Ballarin.Marc@gmx.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20050730004924.087a7630.Ballarin.Marc@gmx.de> X-Warning: Reading this can be dangerous to your mental health. User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi! > I was finally able to get C3 state working. It seems that my BIOS is > leaving USB controllers in an active state(?). Without any USB drivers > loaded, C3 is not possible. With drivers loaded, but no device plugged > in C3 works fine. Kernel is 2.6.13-rc3-mm3 + acpi-sbs. > > With working C3 there are indeed differences: > > Voltage is 16.5 V > > HZ=100: ~460 mA => 7.59 W > HZ=250: ~468 mA => 7.72 W > HZ=1000: ~494 mA => 8.15 W 0.55W difference, wow. And that's 7% difference to overall system consumption. Pavel -- teflon -- maybe it is a trademark, but it should not be.