From mboxrd@z Thu Jan 1 00:00:00 1970 From: Janosch Machowinski Subject: Re: C states on AMD SMP Date: Fri, 09 Sep 2005 12:08:09 +0200 Message-ID: <43215F09.7030909@tzi.de> References: <1126178956.24699.42.camel@localhost.localdomain> <43202621.9080600@tzi.de> <1126182374.4397.8.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1126182374.4397.8.camel-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org> 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: Erik Slagter , acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-acpi@vger.kernel.org Erik Slagter wrote: > On Thu, 2005-09-08 at 13:53 +0200, Janosch Machowinski wrote: > >>Uhm Linux can't detect something, that is not given by your DSDT... >>Even if the CPU and the Chipset support C80, als long as your DSDT does >>not define these states, Linux can't detect them. Extract your DSDT, >>decompile it and search it for the _CST and P_BLK structs. Then verify >>if these structs acually contain C-States (There are some latency >>restrictions for the C-States defined in the P_BLK, for more information >>see www.acpi.info). If you done this please report back. > > > Sorry, I am a newbie at this. > > I did this: cp /proc/acpi/dsdt .; iasl -d dsdt > > This yields a file called dsdt.dsl, which does not contain any string > like _CST or P_BLK. What am I doing wrong here? Ups my fault ;-) The P_BLK is actually defined int the FADT... And you do not have a _CST object, cause it would habe been decalared here : Scope (\_PR) { Processor (CPU0, 0x00, 0x00008010, 0x06) {} Processor (CPU1, 0x01, 0x00000000, 0x00) {} } The little 0x06 after CPU0 tells us that there is an P_BLK, but like pavel told us, I think the OEM of the Mainboard disabled C2 and C3, but you are free to verify it ;-) Janosch ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf