Re: Battery life difference

[Tino Keitel]

On Sat, Jul 05, 2008 at 18:44:21 +0300, Felipe Balbi wrote:
> Hi,
> 
> On Sat, Jul 5, 2008 at 6:23 PM, Arjan van de Ven <arjan@xxxxxxxxxxxxx> wrote:

[...]

> > Also take a look at
> > http://kerneltrap.org/mailarchive/linux-kernel/2008/5/8/1771024 because
> > these patches save like 0.75W in our lab.
> 
> cool, is it merged upstream ?

If I got this right, at least Linux 2.6.25 allows to control this via
"/sys/class/scsi_host/host*/link_power_management_policy". Setting it
to "min_power" does the trick. This is also covered by powertop 1.10
and later.

Regards,
Tino
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