From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754557AbYIJQ4i (ORCPT ); Wed, 10 Sep 2008 12:56:38 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752370AbYIJQ43 (ORCPT ); Wed, 10 Sep 2008 12:56:29 -0400 Received: from hpsmtp-eml13.kpnxchange.com ([213.75.38.113]:28845 "EHLO hpsmtp-eml13.kpnxchange.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752321AbYIJQ43 (ORCPT ); Wed, 10 Sep 2008 12:56:29 -0400 From: Frans Pop To: Alan Cox Subject: Re: Time travel experiment? Date: Wed, 10 Sep 2008 18:56:24 +0200 User-Agent: KMail/1.9.9 Cc: linux-kernel@vger.kernel.org, Thomas Gleixner , Linus Torvalds References: <200809101658.06935.elendil@planet.nl> <200809101755.19927.elendil@planet.nl> <200809101825.29276.elendil@planet.nl> In-Reply-To: <200809101825.29276.elendil@planet.nl> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200809101856.24997.elendil@planet.nl> X-OriginalArrivalTime: 10 Sep 2008 16:56:25.0296 (UTC) FILETIME=[290B2D00:01C91366] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wednesday 10 September 2008, Frans Pop wrote: > On Wednesday 10 September 2008, Frans Pop wrote: > > > > $ date > > > > Wed Jul 3 23:09:23 CEST 2024 Aaah, hmmm. I'm trying to trace a problem with resume. Once in every 5-10 times resume fails with dead display even though most times it resumes perfectly. So I was trying the suggestion in Documentation/power/s2ram.txt and am doing 'echo 1 > /sys/power/pm_trace' before suspending. Just now I find [1] which mentions that the trace info is saved in the RTC, which I guess could well explain the jump. If that's what behind this, wouldn't it make sense to mention that fact in s2ram.txt? But I would not expect the RTC to get changed when the resume is successful. Or does it just get updated with every resume step without a reset to the pre-trace value on completion? [1]https://lists.linux-foundation.org/pipermail/linux-pm/2006-June/008470.html