From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756389AbZJBT3X (ORCPT ); Fri, 2 Oct 2009 15:29:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753607AbZJBT3W (ORCPT ); Fri, 2 Oct 2009 15:29:22 -0400 Received: from mail-bw0-f210.google.com ([209.85.218.210]:35486 "EHLO mail-bw0-f210.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752943AbZJBT3V convert rfc822-to-8bit (ORCPT ); Fri, 2 Oct 2009 15:29:21 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type :content-transfer-encoding; b=Q36l4f1MrcLgL4ox6nsyeWctbMoSAu/d0f42mOdovC3cjBhFmQb1Pd3ZJMB8DJsMDp 98vzqepGE8bj6CYMh9hOQZzGt2/q5BC8xefrTnHZJpX4RtMERaQC4Rwms5GNBgoc0n2B qEfMDbiv/3wb94Q2cRcslRmqRTFt1Eq3PZLHI= MIME-Version: 1.0 In-Reply-To: References: Date: Fri, 2 Oct 2009 15:29:24 -0400 X-Google-Sender-Auth: 5828ef4c6cd79cb3 Message-ID: Subject: Re: High power consumption after suspend/resume cycle From: Andrew Lutomirski To: linux-kernel@vger.kernel.org, linux-thinkpad@linux-thinkpad.org Cc: pm list , ACPI Devel Maling List Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [Adding cc's to linux-pm and linux-acpi and ] On Fri, Oct 2, 2009 at 1:44 PM, Andrew Lutomirski wrote: > Hi all- > > I'm running a git kernel that's slightly newer than 2.6.32-rc1. > > First, thanks for all the great work everywhere on laptop power > consumption -- on my Lenovo X200s, it looks like Linux is getting > close to Windows (Windows wins by about 0.7W, except that its power > usage frequently spikes since Windows apparently still doesn't know > how to sit still and do nothing, whereas Linux's seems more stable.), > even running KDE with compositing enabled and > while connected to wifi, at least after some tweaking. [fixed irrelevant typo above, too.] > > There's a catch, though: after a suspend/resume cycle, power > consumption goes up by over well over a watt.  (On a system that draws > about 7 watts before suspending, that's a big deal.)  I've tried > turning off X, suspending with 'echo mem > /sys/power/state' to avoid > any distro scripts running, and manually restoring SATA power saving > settings, but it still happens.  I even tried unbinding e1000e and > both USB drivers, unloading the i2400 (wimax) driver, iwlagn, and > iwlcore, and it still happens.  This is 100% reproducible, and I'd be > happy to test things. > > This could be a BIOS bug I suppose (although I'm running the latest > BIOS), but Windows 7 does not have this problem at all. > > Any ideas about what to try or what subsystem to blame? > > I'm running Fedora 11 if that makes any difference. This is actually more like 90% reproducible. I've gotten it to stay in low power after suspend a couple times with HAL disabled, but I can't reliably reproduce *that*, either. > > Thanks, > Andy >