Re: problem with cpu eating too much power, prize given if solved

Michael Frank
2004-06-29T20:17:38Z

On Mon, 28 Jun 2004 22:40:09 +0200, Pavel Machek <pavel-AlSwsSmVLrQ@public.gmane.org> wrote:

> Hi!
>
>> Many times I just want to read the screen, eg emails or documents,
>> and then still the cpu will be in idle mode, where
>> it uses 7.5 W out of the about 15 W that the whole machine uses.
>> I have found out from Intel data sheets that my
>> Mobile Intel Celeron 2.0 GHz CPU consumes 7.5 W in idle loop/
>> stop grant/sleep states, (and 5.0 W i deep sleep state).
>>
>> So I would like to have the CPU stopped completely (consuming 0 W)
>> while I still could read the screen. In that way I should
>> be able to have about double the lifetime on the battery,
>> going to about 7 hours from the 3.5 hours I have now.
>>
>> I would like the machine to wake up again by any keystroke
>> on the keyboard or mouse input. I would like the input to be
>> reacted upon (not just used to wake up the system, and
>> then forgotten).
>>
>
> S1 is what you want... but... if you get what you asked for,
> do you realize that for example clock would not update on the desktop
> in this mode?

Which hardware can power down the CPU on its own?