From mboxrd@z Thu Jan 1 00:00:00 1970 From: mike-Z92qn3yYq0hWk0Htik3J/w@public.gmane.org Subject: Re: Processor C states and USB problem Date: Mon, 05 Jan 2004 10:57:57 +0100 Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Message-ID: References: <571ACEFD467F7749BC50E0A98C17CDD8E84E6C@PDSMSX403.ccr.corp.intel.com> Mime-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <571ACEFD467F7749BC50E0A98C17CDD8E84E6C-SRlDPOYGfgogGBtAFL8yw7fspsVTdybXVpNB7YpNyf8@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 Li, Shaohua writes: > > Hi, > C3 is a kind of idle, it means deep power saving. > Actually, I observed the same symptom as you: USB devices caused many bus master activities, which make processor can't enter C3. > So C3 actually IS a good thing. ;) I somehow got it the wrong way around (C3 being no powersave, C1 being powersave). As for polling the USB mouse causing busmaster acitivty, this makes sense as well. Thank you two for that prompt answer, Michael ------------------------------------------------------- This SF.net email is sponsored by: IBM Linux Tutorials. Become an expert in LINUX or just sharpen your skills. Sign up for IBM's Free Linux Tutorials. Learn everything from the bash shell to sys admin. Click now! http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click