From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dominik Brodowski Subject: Re: SSDT on Sony VAIO Date: Thu, 16 Jan 2003 08:46:24 +0100 Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Message-ID: <20030116074624.GA1239@brodo.de> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: To: Nathan Conrad Cc: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org, andrew.grover-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org List-Id: linux-acpi@vger.kernel.org On Wed, Jan 15, 2003 at 05:08:40PM -0800, Grover, Andrew wrote: > > From: Nathan Conrad [mailto:conrad-aYgNHrD+FxfR7s880joybQ@public.gmane.org] > > I am using kernel 2.5.55 on a Sony Vaio PCG-FXA49. Right now, > > /proc/acpi/processor/CPU0/info says that performance management is > > not available. My CPU (1.2 GHz mobile Athlon4) supports PowerNow, and > > I would expect this would qualify as performance management. > > > > I have looked at my ACPI tables and there is a listing of 5 P-states > > in my SSDT (1200 MHz,1000,800,600,500 MHz). > > > > Why are these not listed in my /proc/acpi/processor/CPU0 directory? > > > > Does the current Linux ACPI driver look at the SSDT tables, or does it > > only look at the DSDT for AML? > > It should consume both SSDT and DSDT tables. > > You might try taking a look at the "performance management" section of > drivers/acpi/processor.c. Stick some printk's in > acpi_processor_get_performance_states and see where things are going > awry. > > Also, if _PCT isn't present in the namespace as well, then it flags perf > support as not available. Also, do you have CONFIG_CPU_FREQ and CONFIG_ACPI_PROCESSOR_PERF enabled? If not, support for "performance management" will be disabled. Dominik ------------------------------------------------------- This SF.NET email is sponsored by: A Thawte Code Signing Certificate is essential in establishing user confidence by providing assurance of authenticity and code integrity. Download our Free Code Signing guide: http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0028en