Re: [RFD] Automatic suspend

Arjan van de Ven
2009-02-16T20:45:20Z

On Mon, 16 Feb 2009 15:39:15 -0500 (EST)
Alan Stern <stern@rowland.harvard.edu> wrote:

> On Mon, 16 Feb 2009, Kyle Moffett wrote:
>
> > Userspace may not have a useful decision-making capability regarding
> > functionality versus power-saving, but the user it's talking to
> > might!
> >
> > I think it would be very useful to have a mechanism for userspace to
> > find out "Link detection on this NIC costs ~50mW" and "No link has
> > been detected for the last 15 minutes", so that it can compile all
> > that sort of information and prompt the user what devices they would
> > like to disable. Perhaps an "airline mode" sort of thing?
>
> Even if drivers don't know how much power their devices consume (and
> generally I wouldn't expect them to), it still makes sense to offer
> userspace the discretionary power to force devices into a low-power
> mode. USB does this.

"stop using it" isn't this discretionary power ?
(for NICs this is "ifconfig .. down")

--
Arjan van de Ven Intel Open Source Technology Centre
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