Re: 2.6.13-rc3 Battery times at 100/250/1000 Hz = Zero difference

Pavel Machek
2005-07-22T18:03:47Z

Hi!

> and catting /proc/acpi/processor/CPU0/power gives
> active state: C1
> max_cstate: C8
> bus master activity: 00000000
> states:
> *C1: type[C1] promotion[--] demotion[--] latency[000] usage[02998796]
>
> /sys/module/processor/parameters/max_cstate says 8
> /sys/module/processor/parameters/bm_history says 4294967295
>
> So I'm a bit baffled that no C2/C3 turns up. I've done a test-compile
> with all of ACPI in kernel instead of as modules, but there was no
> difference.
>
> I'll unload the whole USB-module part and boot without loading them, but
> will it matter? Please provide more details about how to debug this
> (very confusing) field.

Okay, if you have no C2/C3 like the dump above shows, unloading usb
will not help. It seems like your machine is simply not able to do
reasonable powersaving.
Pavel

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