Impacts of disabling Automatic Power Management

[Paul Fox]

jerry wrote:
 > 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]:
 > > >
 > > >  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
 > dlo#10856?

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
 > source.

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.

paul

 > 
 > > > erikos reckons that the patch won't do much [2]
 > > 
 > > 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.
 > 
 > Jerry 
 > 
 > 
 > _______________________________________________
 > Devel mailing list
 > Devel at lists.laptop.org
 > http://lists.laptop.org/listinfo/devel

=---------------------
 paul fox, pgf at laptop.org