Re: CPU - Power state (Cx) usage count not working

Gerfried Maier
2006-01-23T11:39:50Z

Hi Niko!

Thanks for your quick reply.

Niko Ehrenfeuchter wrote:
> [...]
>>active state: C2
>>default state: C1
>>bus master activity: 00004f00
>>states:
>> C1: promotion[C2] demotion[--] latency[000]
>>usage[00033670]
>> *C2: promotion[C3] demotion[C1] latency[084]
>>usage[00357060]
>> C3: promotion[--] demotion[C2] latency[120]
>>usage[00000000]
>> [...]

> the counter normally shows the de facto usage, so I assume your system
> never uses C3 in the above situation. Unloading the usb-modules on a 2.4
> kernel _might_ help, but it also might not suffice.

The above example was not a capture from my system (which i
unfortunately do not have available by now) but the example given in the
wiki-entry you referred below.

On my system all _3 counters_ C1, C2 and C3 always stay at [00000000]
and not only the C3 counter.

Having read my original posting again, I'm afraid that this ambiguity
was caused by me with my unclear formulation of the OP. Sorry for this.

> [...]
>
> http://acpi.sourceforge.net/wiki/index.php/WhyMyCxPowerStateIsNotUsed

moali