From mboxrd@z Thu Jan 1 00:00:00 1970 From: Len Brown Subject: Re: APM sleep vs. ACPI S3 sleep Date: 20 May 2004 23:57:47 -0400 Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Message-ID: <1085111866.12354.567.camel@dhcppc4> References: <40ACE6B4.4060408@mesias.co.uk> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <40ACE6B4.4060408-Nk/s8sJ9yP7QXOPxS62xeg@public.gmane.org> Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Cam Cc: ACPI Developers List-Id: linux-acpi@vger.kernel.org On Thu, 2004-05-20 at 13:11, Cam wrote: > Hi > > APM sleep eg. when running linux 2.4 with the APM behaviour in the BIOS > used to suspend the machine, the battery would last for a long time and > the machine would be cold to the touch (ie it's at the ambient temperature). > > ACPI S3 sleep looks the same but the battery does not last long and the > machine is warm to the touch. > > Has anyone else seen this behaviour? Is it possible that the machine is > waking itself periodically or at a certain level of discharge? Is it > possible to make the ACPI sleep deeper? S3 is suspend to RAM, so the processor will be off, but RAM will still be refreshed; and some devices may still consume power. S4 is suspend to disk, and it should be as cold this way as S5. -Len ------------------------------------------------------- This SF.Net email is sponsored by: Oracle 10g Get certified on the hottest thing ever to hit the market... Oracle 10g. Take an Oracle 10g class now, and we'll give you the exam FREE. http://ads.osdn.com/?ad_id=3149&alloc_id=8166&op=click