From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexey Starikovskiy Subject: Re: Power States Date: Wed, 20 Dec 2006 22:56:37 +0300 Message-ID: <45899575.40501@linux.intel.com> References: <569c97d20612201033g69b7d345i657dc6f62f591854@mail.gmail.com> <45898257.5060004@linux.intel.com> <569c97d20612201051la543b85r11a789affe356e1@mail.gmail.com> <458988A4.7050801@linux.intel.com> <569c97d20612201109i7c8d3accl6ac2346ba023401b@mail.gmail.com> <45898B95.2020007@linux.intel.com> <569c97d20612201120q37e12982u7c006180604242b@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mga07.intel.com ([143.182.124.22]:4084 "EHLO azsmga101.ch.intel.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1030335AbWLTT4m (ORCPT ); Wed, 20 Dec 2006 14:56:42 -0500 In-Reply-To: <569c97d20612201120q37e12982u7c006180604242b@mail.gmail.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Balaji Rao Cc: linux-acpi@vger.kernel.org I already told you to look for enabling DBS/EST/speedstep in your BIOS... Balaji Rao wrote: > also i get these two errors. kernel version 2.6.20-rc1-mm1 > ACPI Exception (acpi_processor-0680): AE_NOT_FOUND, Processor Device > is not present [20060707] > ACPI Exception (acpi_processor-0680): AE_NOT_FOUND, Processor Device > is not present [20060707] > and, > > acpi_processor-0740 [00] processor_preregister_: Error while parsing > _PSD domain information. Assuming no coordination > > does power management "no" mean, hardware does not suppport it? or can > it be enabled? > > On 12/21/06, Alexey Starikovskiy > wrote: >> 6 is lowest FSB multiplier, 0.266*6 = 1.6GHz -- your lowest. >> 7 is multiplier to get 1.86Ghz -- your max. >> >> "power management: no" means power management is disabled. >> >> >> Balaji Rao wrote: >> > also, the file cat /proc/acpi/processor/CPU1/info gives this >> > >> > processor id: 0 >> > acpi id: 1 >> > bus mastering control: yes >> > power management: no >> > throttling control: yes >> > limit interface: yes >> > >> > Is power management not available according to this file? >> > >> > One more thing is that, only two frequency levels ( 1.86 and 1.6 Ghz) >> > are being used. This does not cause much power saving.. >> > >> > How many levels are actually available on core 2 duo? >> > >> > I cant find any PSS in the DSDT dump. >> > >> > On 12/21/06, Alexey Starikovskiy >> > wrote: >> >> Then you should check your BIOS settings for DBS/EST/speedstep etc >> >> support. >> >> C1 is the only C-state supported on CoreDuo2. >> >> PSS should give you P-states. >> >> >> >> Balaji Rao wrote: >> >> > But, acpidump doest give me anything saying SSDT.. >> >> > Actually the problem is, only one power state(C1) is being shown >> up in >> >> > my Core 2 Duo (E6300) box. >> >> > >> >> > Also, power management is reported as not available. >> >> > >> >> > Where can i look for a solution? >> >> > >> >> > >> >> > On 12/21/06, Alexey Starikovskiy >> >> > wrote: >> >> >> Balaji Rao wrote: >> >> >> > Hello all, >> >> >> > >> >> >> > Are the various power levels supported by the processor provided >> >> only >> >> >> > through the DSDT? Or is there any other table for this purpose? >> >> >> > When i disassembled my DSDT, i could not find any _PSS Packages. >> >> >> > >> >> >> > From where does the kernel read values into the frequency table? >> >> >> > >> >> >> > Also, which is the mechanism that decides to load the >> appropriate >> >> >> > cpufreq driver? >> >> >> > >> >> >> > warm regards >> >> >> > >> >> >> > Balaji Rao >> >> >> > - >> >> >> > To unsubscribe from this list: send the line "unsubscribe >> >> >> linux-acpi" in >> >> >> > the body of a message to majordomo@vger.kernel.org >> >> >> > More majordomo info at >> http://vger.kernel.org/majordomo-info.html >> >> >> Check SSDTs as well. >> >> >> >> >> >> Regards, >> >> >> Alex. >> >> >> >> >> > >> >> > >> >> >> > >> > >> > >