From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marco Calviani Subject: Information regarding C3 cpu state and bus mastering activity Date: Sun, 11 Dec 2005 21:10:53 +0100 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Return-path: Content-Disposition: inline Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-acpi@vger.kernel.org Hi acpi-devel list, I have a problem regarding C3 states and usb. When i'm plugging in any usb devices, the my busmaster activity starts couting preventing the cpu to go to C3 state. Obviously if i unload all usb-related modules, C3 state goes in, my battery lives longer and the laptop stays quiter; unfortunately i need an usb-mouse (and possibly also an external USB drive. I've read somewhere that this is a specific ACPI standard behaviuor but i'm asking if this can be modified in some way, i.d. is it possible, with some workarounds, to enter C3 state also with the usb modules? PS: i'm using a Travelmate 8005 laptop with a 1.8GHz dothan centrino and debian sid. i'm running kernel 2.6.12.6 Thank you very much for your interest, Marco Calviani ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://ads.osdn.com/?ad_id=7637&alloc_id=16865&op=click