From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Lutomirski Subject: Re: High power consumption after suspend/resume cycle Date: Fri, 2 Oct 2009 15:29:24 -0400 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: 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 In-Reply-To: Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: linux-kernel@vger.kernel.org, linux-thinkpad@linux-thinkpad.org Cc: pm list , ACPI Devel Maling List [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. =A0(On a system that dr= aws > about 7 watts before suspending, that's a big deal.) =A0I'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. =A0I even tried unbinding e1000e and > both USB drivers, unloading the i2400 (wimax) driver, iwlagn, and > iwlcore, and it still happens. =A0This 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 > -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html