Impacts of disabling Automatic Power Management
pgf at laptop.org
Thu Feb 9 18:16:46 EST 2012
> On Thu, 2012-02-09 at 13:24 -0500, Martin Langhoff wrote:
> > On Wed, Feb 8, 2012 at 10:16 PM, Sridhar Dhanapalan
> > <sridhar at laptop.org.au> wrote:
> > > In our next build, we will be doing two things :
> > >
> > > 1. enabling the patch
> > > 2. disabling wake-on-LAN
> > I would not do #2.
> How would one disable waking up with multicast as suggested in
turn off the WAKE_ON_WLAN config setting in powerd.conf.
> > > Living up to its name, wake-on-LAN keeps the XOs awake whenever a
> > > network connection is active, even when you don't really need it to
> > I think you are misunderstanding how WOL works. I can't get into this
> > topic right now, and I can't find a good reference
> > (http://en.wikipedia.org/wiki/Wake-on-LAN does not really fit with
> > what we do).
> >From the log files and observations the screen never dims when connected
> to any network.
> > Powerd's code and README are perhaps a good read if you want to
> > understand this topic.
> I might be blind, but where is the README? I don't see it in the git
martin's just misremembering. the long-winded docs are in the powerd
script itself. http://dev.laptop.org/git/users/pgf/powerd/tree/powerd
or /usr/sbin/powerd .
the config vars are also described in /etc/powerd/powerd.conf, so you
might just want to start there.
> > > erikos reckons that the patch won't do much 
> > I agree that his patch is not enough, but I'm not convinced of his
> > argument that it's almost useless... I think he is also
> > misunderstanding some aspects of it :-)
> Well, we're testing this combination, someone has to take the lead.
> Without doing anything the XOs will never use the full potential of
> power saving that maybe available.
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paul fox, pgf at laptop.org
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