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Re: Missing C-States on Core Duo

On Sun, Feb 04, 2007 at 04:19:01PM +0100, Frank Ursel <listadress@gmx.net> wrote:
> Hello.
> On my laptop [1] shows a maximum of 8 c-states. But only 3 are in use.
> Where are the others gone? The output of dmesg[2] shows only three of
> them, too. The max_cstate reports 8 so whats wrong with my system? As
> far as I know, there should be at least a C4-state. Is there any
> parameter, I need to pass through the kernel or is it a damn limitation
> of my system or what else went wrong? The laptop is a Fujitsu-Siemens
> S7110 and I'm using a brand new Etch.

FWIW, here, it's
active state:            C2
max_cstate:              C8
bus master activity:     c8444672
    C1:                  type[C1] promotion[C2] demotion[--] latency[000] usage[00000010] duration[00000000000000000000]
   *C2:                  type[C2] promotion[--] demotion[C1] latency[001] usage[01848151] duration[00000000019686907116]

max_cstate is also C8, but I only have 2 C-states when on AC power, and
2 more C-states show up when on battery. I don't think you have to


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