From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Randy.Dunlap" Subject: Re: Processor C states and USB problem Date: Fri, 9 Jan 2004 09:35:53 -0800 Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Message-ID: <20040109093553.31aa1c79.rddunlap@osdl.org> References: <571ACEFD467F7749BC50E0A98C17CDD8E84E6C@PDSMSX403.ccr.corp.intel.com> <1073640699.10144.14.camel@ltspc67.epfl.ch> <1073643322.10144.23.camel@ltspc67.epfl.ch> <20040109165421.6fc2483a.mike@it-loops.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20040109165421.6fc2483a.mike-Z92qn3yYq0hWk0Htik3J/w@public.gmane.org> Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Michael Guntsche Cc: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org, Diego.SantaCruz-p8DiymsW2f8@public.gmane.org List-Id: linux-acpi@vger.kernel.org On Fri, 9 Jan 2004 16:54:21 +0100 Michael Guntsche wrote: | On Fri, 09 Jan 2004 11:15:22 +0100 | Diego SANTA CRUZ wrote: | | > On Fri, 2004-01-09 at 11:05, Petr Olivka wrote: | > > in 2.4 kernel I have to unload all usb modules. Then power drop to C3 | > > state. If I remember, only usbcore can be loaded (on my D600). | > > | > | > But even booting with init=/bin/sh and without ever loading any USB | > module I get permanent bus mastering activity. Any ideas? | | I see the same on my notebook with a 2.4 kernel. Sometimes it works, but most of the time | there is Bus master acitivty. | With 2.6 I only see that if I have a USB device plugged in (mouse) that gets polled. It seems like one of the early usb uhci host controller drivers (HCDs) generated lots of bus master activity. Are you sure that uhci or usb-uhci is not loaded (in the 2.4 problem case), even though no USB device drivers are loaded? -- ~Randy MOTD: Always include version info. ------------------------------------------------------- This SF.net email is sponsored by: Perforce Software. Perforce is the Fast Software Configuration Management System offering advanced branching capabilities and atomic changes on 50+ platforms. Free Eval! http://www.perforce.com/perforce/loadprog.html