From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932106AbZJBRog (ORCPT ); Fri, 2 Oct 2009 13:44:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932075AbZJBRof (ORCPT ); Fri, 2 Oct 2009 13:44:35 -0400 Received: from mail-bw0-f210.google.com ([209.85.218.210]:36540 "EHLO mail-bw0-f210.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757801AbZJBRoe (ORCPT ); Fri, 2 Oct 2009 13:44:34 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:date:x-google-sender-auth:message-id:subject :from:to:content-type; b=GyfPMugM3I8+qGEhCD8SWy3By9715ZQ1yiK9BTgbgyZ539n/E7YOnqWMcWvV08zGdy Gxb8Bs7T6vURp/C3xcCb77m4c9VT78mukTp1OqC/t+urGn+MJKcQ4X3HvUtcFst9Q3JV fyaemCqsc4zoOzTdXmzErLvPiS2IlCbXitmi8= MIME-Version: 1.0 Date: Fri, 2 Oct 2009 13:44:37 -0400 X-Google-Sender-Auth: 0577e9f37fe2e39d Message-ID: Subject: High power consumption after suspend/resume cycle From: Andrew Lutomirski To: linux-kernel@vger.kernel.org, linux-thinkpad@linux-thinkpad.org Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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.). Windows after a reboot, even running KDE with compositing enabled and while connected to wifi, at least after some tweaking. 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. Thanks, Andy