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Re: ACPI with AMD64

Thimo Eichstaedt (abc@digithi.de) wrote:
> Hi folks,
The CPU does support powesaving, but does the BIOS?
Which motherboard do you have, and do you have powernow/cool'n'quiet enabled in BIOS?

> I have an Athlon AMD 64 3000 MHz and want to use its powersaving futures. Therefore I am using PowerNow with the powernow_k8 module. This is working 
> great.
> Additionally it should be possible to profit from the power states of the processor (C1...C8). But the ACPI module tells me that only C1 is availabe:
> Modules loaded: processor, powernow_k8, cpufreq_userspace
> dmesg output when loading processor.ko module:
> ...
> ACPI: CPU0 (power states: C1[C1])
> ...
> cat /proc/acpi/processor/CPU0/power:
> active state:            C1
> max_cstate:              C8
> bus master activity:     00000000
> states:
>     *C1:                  type[C1] promotion[--] demotion[--] latency[000] usage[03559864]
>   cat /proc/acpi/processor/CPU0/throttling
> <not supported>
> Is this correct or what have I done wrong ? Can anybody with a AMD64 processor perhaps post its proc output ?
> Thanks
>    Thimo
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