From mboxrd@z Thu Jan 1 00:00:00 1970 From: Diego SANTA CRUZ Subject: RE: Processor C states and USB problem Date: Mon, 12 Jan 2004 11:50:06 +0100 Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Message-ID: <1073904606.6168.1.camel@ltspc67.epfl.ch> References: <3ACA40606221794F80A5670F0AF15F8401720CB9@PDSMSX403.ccr.corp.intel.com> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <3ACA40606221794F80A5670F0AF15F8401720CB9-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: "Yu, Luming" Cc: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-acpi@vger.kernel.org On Mon, 2004-01-12 at 09:31, Yu, Luming wrote: > > I picked up this thread and I'm interested in knowing a bit more about > > bus mastering and C3, as my laptop never goes into C3. I own a Dell > > Inspiron 8500 (details at > > http://ltswww.epfl.ch/~dsanta/resources/dell-i8500-linux). > > > > This is what I get for the power states: > > # cat /proc/acpi/processor/CPU0/power > > active state: C2 > > default state: C1 > > bus master activity: ffffffff > > states: > > C1: promotion[C2] demotion[--] > > latency[000] usage[00039800] > > *C2: promotion[C3] demotion[C1] > > latency[050] usage[00573330] > > C3: promotion[--] demotion[C2] > > latency[050] usage[00000004] > > > > I tried booting with init=/bin/sh and manually loading the processor > > module, without any external hardware attached, so that no special > > hardware is initialized, but still there is non-stopping bus mastering > > activity. What could be causing it? Any ideas how could I find out? > > I just filed a tracker http://bugme.osdl.org/show_bug.cgi?id=1839. > I tested with a bare bones kernel config and the problem persists. I entered all the data that I thought useful in the bugzilla entry above. Let me know if anything else is needed to help debug the problem. Best, Diego -- ------------------------------------------------------- Diego Santa Cruz - PhD Publications available at http://ltswww.epfl.ch/~dsanta Signal Processing Institute (LTS1 / ITS / STI) Swiss Federal Institute of Technology (EPFL) EPFL - STI - ITS, CH-1015 Lausanne, Switzerland E-mail: Diego.SantaCruz-p8DiymsW2f8@public.gmane.org Phone: +41 - 21 - 693 26 57 Fax: +41 - 21 - 693 76 00 ------------------------------------------------------- ------------------------------------------------------- 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