Re: Power States

[Alexey Starikovskiy <alexey.y.starikovskiy@linux.intel.com>]

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 
> <alexey.y.starikovskiy@linux.intel.com> 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
>> > <alexey.y.starikovskiy@linux.intel.com> 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
>> >> > <alexey.y.starikovskiy@linux.intel.com> 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.
>> >> >>
>> >> >
>> >> >
>> >>
>> >
>> >
>>
>
>