Re: [PATCH 2/2] Fix console handling during suspend/resume

Pavel Machek
2006-07-03T21:32:11Z

Hi!

> > > We're building the OLPC machine in which the wireless hardware is alive
> > > (and able to forward packets in the mesh) even with the machine STR.
> > > Even our ATest hardware supports this for wireless.
> >
> > > Similarly for the screen; it can be "alive" while the machine is STR.
> > > The power savings are dramatic. the screen takes an ASIC we don't have
> > > back yet, so that we won't have until the next batch of boards. And
> > > with the Geode's UMA, all we should have to do on the console is save
> > > and restore the graphics registers, which should be very fast.
> >
> > Actually, what you are doing is _not_ suspend-to-RAM. You are doing
> > (trying to do?) very advanced kind of runtime power management on PC
> > platform (that happens to use S3).
>
> I suppose it is a matter of definitions... However, the main CPU is in
> fact going to be suspended to RAM; it's just that our wireless and
> screen are able to run autonomously.

Well, and keyboard ... so that machine "pretends" to be powered on,
no? That is actually more similar to very deep CPU sleep...

> > I hope we'll be able to do the same on regular notebooks some day...
> >
>
> So do we.
>
> It is fun for Linux to be going first for once.
>
> If you want a board to play with, let me know, Pavel (and others)...
> This is not mythological hardware, but stuff I can ship out immediately.
> (though the video has to wait until the next revision of the board:
> we're doing an asic for that, and won't have that chip for several more
> months).

I'm afraid I'd not force myself to use machine without display. I
still need to get that dual-core home-server running...
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html