From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vernon Mauery Subject: ACPI S3 draws too much power on T40/T41 Date: Thu, 08 Jul 2004 13:58:24 -0700 Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Message-ID: <1089320304.2089.176.camel@bluerat> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: acpi-devel List-Id: linux-acpi@vger.kernel.org The following message was posted on the LKML not long ago. I thought that this mailing list might be a good forum to help in finding out the cause for this. Being rather new to this area (ACPI), I am not entirely sure of what would be the cause of this. My guess is that the drivers used for the T40 are not power management aware and thus do not properly power down the devices when entering S3. Just out of curiosity, I checked to see how well it does in winXP and it works fine there. APM under Linux also works fine to suspend. But S3 draws enough power to keep the laptop warm when it is asleep. These tests are what pushed me to the conclusion that the drivers are not PM aware. A bug has been opened by Volker Braun (the author of the forwared email) on the bugme database: http://bugme.osdl.org/show_bug.cgi?id=3022 --Vernon -----Forwarded Message----- From: Volker Braun To: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: linux-thinkpad-l7BEYHA5S10i5T99jlK1Sh2eb7JE58TQ@public.gmane.org Subject: Re: ACPI Hibernate and Suspend Strange behavior 2.6.7/-mm1 Date: Tue, 06 Jul 2004 10:14:48 -0400 ACPI S3 draws too much power on the T40/T41, this has been confirmed by various people (so its not just mine). Suspended it lasts about 10h, about twice as long as powered up. Supposed to be 1-2 weeks. I guess we should have filed a bug report a long time ago. I'll do that now. If anybody has any tips on how to debug this (debug a suspended machine :-) I would like to know. Best, Volker - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ ------------------------------------------------------- This SF.Net email sponsored by Black Hat Briefings & Training. Attend Black Hat Briefings & Training, Las Vegas July 24-29 - digital self defense, top technical experts, no vendor pitches, unmatched networking opportunities. Visit www.blackhat.com