Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757176AbZKROGH (ORCPT ); Wed, 18 Nov 2009 09:06:07 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756888AbZKROGH (ORCPT ); Wed, 18 Nov 2009 09:06:07 -0500 Received: from tac.ki.iif.hu ([193.6.222.43]:57940 "EHLO tac.ki.iif.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756835AbZKROGG (ORCPT ); Wed, 18 Nov 2009 09:06:06 -0500 From: Ferenc Wagner To: "Rafael J. Wysocki" Cc: linux-pm@lists.linux-foundation.org, Jesse Barnes , Andrew Morton , yakui.zhao@intel.com, LKML , ACPI Devel Maling List , Len Brown Subject: Re: [linux-pm] intermittent suspend problem again References: <87fx93pwv2.fsf@tac.ki.iif.hu> <200911132059.46377.rjw@sisk.pl> <874ooxho2b.fsf@tac.ki.iif.hu> <200911141952.50030.rjw@sisk.pl> Date: Wed, 18 Nov 2009 15:05:47 +0100 In-Reply-To: Ferenc Wagner's message of "Wed\, 18 Nov 2009 02\:12\:32 +0100" Message-ID: <87r5rwrkqs.fsf@tac.ki.iif.hu> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1344 Lines: 28 Ferenc Wagner writes: > Since I've instrumented s2disk and the hibernation path, no freeze > happened during hibernating the machine. Not until I removed the delays from hibernation_platform_enter(), which were put there previously to get step-by-step feedback. Removing them again resulted in a freeze in short course, maybe just two hibernations later. The instrumentation shows it stuck in dpm_suspend_start(PMSG_HIBERNATE). Does it mean that some device driver is at fault? I'll check if it always fails at the same point (although tracing into dpm_suspend_start isn't pure fun because of the multitude of devices it loops over). Is there any way to get printk output from that phase? Side question: If I run s2disk from the init=/bin/bash prompt, the instrumentation in acpi_enter_sleep_state_prep in drivers/acpi/acpica/hwsleep.c fires before the "Snapshotting system" phase, but it does not fire if I hibernate from the full running desktop. (That instrumentation was put there to investigate the KMS-triggered STR freeze.) What could explain this? -- Thanks, Feri. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/