Am Freitag 12 Oktober 2007 schrieb Hans Petter Jansson:
> On Thu, 2007-10-11 at 22:24 +0200, Oliver Neukum wrote:
> > Am Donnerstag 11 Oktober 2007 schrieb Christian Boltz:
>
> > > IMHO the answer depends on how many energy can be saved. Do you have
> > > some rough numbers?
>
> > On my old laptop about 5% when idle. It depends on the exact configuration.
> > 5% should be about typical for a laptop with only a keyboard (or mouse)
> > attached. The main savings come from suspending the controller and
> > going into deeper C states, so it doesn't matter which type of device is
> > attached as long as it supports autosuspend.
>
> I prefer the energy savings. 5% (I assume as a fraction of maximum power
5% of average energy consumption when idle.
> consumption) is noticeable. If your total battery lifetime is 3 hours
> you will get an additional 9 minutes.
>
> I'm also assuming the keyboard LEDs would come back when you start doing
> something, like typing, and stay on for a while before going away again.
They go on again, but the longer they stay on the less savings you get.
The 5% figure is for a timeout of 2 seconds.
> On the other hand, I'm not sure how common it is to have a keyboard
> attached to a laptop running on batteries...
Newer Apples have internal USB keyboards.
Regards
Oliver
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
