Re: Centrino question

[Martin Hermanowski <martin-lb+GC1uVkU0@public.gmane.org>]

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On Fri, May 21, 2004 at 10:38:57AM -0700, Ow Mun Heng wrote:
> On Fri, 2004-05-21 at 04:52, Karol Kozimor wrote:
> > Thus wrote Cyril Wattebled:
> > > However, I don't understand, I was told that the centrino processor and chipset
> > > supports C3 and even C4.
> 
> C3 is Supported
> 
> 
> active state:            C2
> default state:           C1
> bus master activity:     ffffffff
> states:
>     C1:  promotion[C2] demotion[--] latency[000] usage[01028830]
>    *C2: promotion[C3] demotion[C1] latency[050] usage[04785987]
>     C3:  promotion[--] demotion[C2] latency[050] usage[00001327]
> 
> This is a Dell D600 1.4g. c3 values are low because I have the USB mouse
> on right now. (note the fffffff??)

The same here (ibm t41p, 1.7GHz). Using USB forces c2. But c1 seems to be used
very seldom (usage count of 10).

> I've tested it with and w/o C3. The difference in the battery lifetime
> was only very minmal. I got like maybe 10 mins extra.

15min here.

LLAP, Martin

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