From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753249AbbDCP66 (ORCPT ); Fri, 3 Apr 2015 11:58:58 -0400 Received: from 178.212.147.28.siec.idealan.pl ([178.212.147.28]:54494 "EHLO porcupinefactory.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753174AbbDCP6h (ORCPT ); Fri, 3 Apr 2015 11:58:37 -0400 Date: Fri, 3 Apr 2015 17:58:25 +0200 From: rhn To: Pavel Machek Cc: rhn , kernel list , joeyli.kernel@gmail.com, linux-pm@vger.kernel.org, "Rafael J. Wysocki" Subject: Re: Unreliable hibernation on Lenovo x230 (regression) Message-ID: <20150403175825.79816fea@porcupinefactory.org> In-Reply-To: <20150402152805.GA17021@amd> References: <20150401214743.20fbe2c5@porcupinefactory.org> <20150402152805.GA17021@amd> X-Mailer: Claws Mail 3.11.1 (GTK+ 2.24.27; x86_64-redhat-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2 Apr 2015 17:28:05 +0200 Pavel Machek wrote: > On Wed 2015-04-01 21:47:43, rhn wrote: > > Hello, > > > > Between kernel 3.16 and 3.17, a regression has been introduced where the first hibernation after regular shutdown always fails to resume. Subsequent hibernations succeed. > > > > The system is a Lenovo x230 with Intel i5, booting with EFI, with the hibernate partition located on a secondary SSD drive. Installed system is Fedora 20, hibernation and reboots were issued using the KDE shutdown dialog. > > > > I have tracked the problem to first appear in the commit > > e67ee10190e69332f929bdd6594a312363321a66 Merge branches 'pm-sleep', 'pm-cpufreq' and 'pm-cpuidle' > > > > The problem itself manifests in dmesg as follows (system was first > > restarted, then hibernated - this log is from the subsequent > resume): > > Ok, can you try to disable cpufreq and cpuidle, and then try if it > reproduces? > > At that point, this is the candidate: > > commit e67ee10190e69332f929bdd6594a312363321a66 > Merge: 21c806d 84c91b7 39c8bba 372ba8c > Author: Rafael J. Wysocki > Date: Mon Aug 11 23:19:48 2014 +0200 > > Merge branches 'pm-sleep', 'pm-cpufreq' and 'pm-cpuidle' > > * pm-sleep: > PM / hibernate: avoid unsafe pages in e820 reserved regions > > ... > Alternatively, you can just try to revert > > commit 84c91b7ae07c62cf6dee7fde3277f4be21331f85 > Author: Lee, Chun-Yi > Date: Mon Aug 4 23:23:21 2014 +0800 > > PM / hibernate: avoid unsafe pages in e820 reserved regions > > When the machine doesn't well handle the e820 persistent when > hibernate > resuming, then it may cause page fault when writing image to > snapshot > buffer: > > > ... > > Thanks, > Pavel I tried to disable CONFIG_CPU_IDLE and CONFIG_CPU_FREQ, however for some reason I could only disable CONFIG_CPU_FREQ. The bug persisted. Reverting the commit 84c91b7 on top of e67ee10 fixes the problem. I created a copy of the bug report here: https://bugzilla.kernel.org/show_bug.cgi?id=96111 Cheers, rhn