From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261755AbVDEOMV (ORCPT ); Tue, 5 Apr 2005 10:12:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261753AbVDEOMU (ORCPT ); Tue, 5 Apr 2005 10:12:20 -0400 Received: from atrey.karlin.mff.cuni.cz ([195.113.31.123]:30941 "EHLO atrey.karlin.mff.cuni.cz") by vger.kernel.org with ESMTP id S261755AbVDEOL7 (ORCPT ); Tue, 5 Apr 2005 10:11:59 -0400 Date: Fri, 1 Apr 2005 21:18:48 +0200 From: Pavel Machek To: Shawn Starr Cc: LKML , lenb@intel.com Subject: Re: [2.6.12-rc1][ACPI][suspend] /proc/acpi/sleep vs /sys/power/state issue - 'standby' on a laptop Message-ID: <20050401191848.GA1330@openzaurus.ucw.cz> References: <200503280249.05933.shawn.starr@rogers.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200503280249.05933.shawn.starr@rogers.com> User-Agent: Mutt/1.3.27i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi! > I've noticed something strange with issuing 'standby' to the system: > > when echoing "standby" to /sys/power/state, nothing happens, not even a log or > system activity to attempt standby mode. > > However, trying echo "1" to /proc/acpi/sleep the system attempts to (standby) > and aborts: > > [4295945.236000] PM: Preparing system for suspend > [4295946.270000] Stopping tasks: > =============================================================================| > [4295946.370000] Restarting tasks... done > > We get no reason as to why it quickly aborts. > [4294672.065000] ACPI: CPU0 (power states: C1[C1] C2[C2] C3[C3]) > [4294676.827000] ACPI: (supports S0 S3 S4 S5) ...aha, but your system does not support S1 aka standby. > What is '1' in /proc/acpi/sleep? standby mode is not the same as suspend to > ram? when I put a normal desktop in standby mode its still 'on' but the hard > disk is put to sleep and the system runs in a lower power mode. stanby != suspend to ram. Pavel -- 64 bytes from 195.113.31.123: icmp_seq=28 ttl=51 time=448769.1 ms