From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964848AbWGBSGQ (ORCPT ); Sun, 2 Jul 2006 14:06:16 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964862AbWGBSGP (ORCPT ); Sun, 2 Jul 2006 14:06:15 -0400 Received: from gw.goop.org ([64.81.55.164]:55491 "EHLO mail.goop.org") by vger.kernel.org with ESMTP id S964848AbWGBSGP (ORCPT ); Sun, 2 Jul 2006 14:06:15 -0400 Message-ID: <44A80B20.1090702@goop.org> Date: Sun, 02 Jul 2006 11:06:24 -0700 From: Jeremy Fitzhardinge User-Agent: Thunderbird 1.5.0.4 (X11/20060613) MIME-Version: 1.0 To: Jean-Marc Valin CC: Linux Kernel , cpufreq@lists.linux.org.uk Subject: Re: Suspend to RAM regression tracked down References: <1151837268.5358.10.camel@idefix.homelinux.org> In-Reply-To: <1151837268.5358.10.camel@idefix.homelinux.org> Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Jean-Marc Valin wrote: > A while ago, I reported a suspend to RAM regression (fail to resume). I > have since then tracked down the regression to the changes between > 2.6.12-rc5-git5 and 2.6.12-rc5-git6. On my laptop, I have only been able > to reproduce the problem with the ondemand cpufreq governor, but I've > head of another user with the same (Dell D600) laptop having problem > with the userspace governor as well. All the details are actually > http://bugzilla.kernel.org/show_bug.cgi?id=6166 but it seems like it's > being ignored. It's currently assigned to the ACPI category, but maybe > it belongs to cpufreq? Anyone can help here? > There was a race in ondemand and conservative which made them lock up on resume (possibly only on SMP systems though). There's a patch for that in current -mm, but I suspect there's another problem (still haven't had any time to track it down). The workaround is to switch to one of the performance/powersave/user governors just before suspend, and restore the governor on resume. J