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ACPI with AMD64

Hi folks,

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
*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 ?


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