suspend/resume support?

[Jake B]

I upgraded to joyride 1472. Suspend/resume does work, but it seems to
manifest some unexpected behavior. I'm not sure whether any of this
should be reported in trac, and I would appreciate getting some
feedback.

* Closing the lid suspends, but opening the lid does not automatically
unsuspend. I have to press the power button to get it to unsuspend.

* I think behavior has been added to mess with the backlight. For
example, after about 30 seconds of minimal activity, the screen dims.
Soon after, the laptop suspends. This would be fine, but
unfortunately, it fails to take into account the screens current
brightness. So, for example, when I have the backlight turned off and
am relying on ambient light and the transreflective screen, after
about 30 seconds of inactivity, the backlight switches into its
"minimal power" mode. If it then suspends and then unsuspends, the
backlight turns on to full brightness. I think expected behavior would
be to use the brightness manually set by the user as an upper bound
for screen brightness, or some other logic that takes user preference
into account.

* When the laptop automatically goes to sleep and is woken up by
pressing one of the gamepad keys, the laptop acts as if that key were
being held down. I have to tap the gamepad in another direction to get
it to escape this mode.

* While suspended, the mesh icon stays lit and the network activity
icon continues to flash. Also, the battery drains quite rapidly,
within a couple of hours. I think these two things might be related. I
know that the mesh on the laptop is always supposed to remain active,
even when the laptop is suspended or turned off, but I still wouldn't
expect it to drain the battery so quickly.

Please let me know what you think.
Thanks.

Jake

On Dec 24, 2007 11:14 PM, Jake B <otakuj462 at gmail.com> wrote:
> Read the blog. Given what you're trying to do with suspend/resume, I
> can understand why it might be challenging.
> I got my developer key today and am updating to the latest joyride.
> I'll post if suspend/resume works for me.
>
> Jake
>
> On Dec 24, 2007 1:56 PM, Jim Gettys <jg at laptop.org> wrote:
>
> > If you read my blog (http://www.gettysfamily.org/wordpress/ you'll get a
> > taste for what was involved in building/debugging a machine to
> > suspend/resume *really* well.  I have one more installment to write, but
> > the first two installments that will give you a taste of what we went
> > through.
> >
> > We ran out of time to get the user level policy done in time; the
> > testing of the hardware became totally consuming for the team.  We could
> > always fix the software later: but you don't get to fix the hardware.
> >
> > Fixed in update.1 (or joyride, today).
> >                              - -Jim
> >
> >
> >
> >
> > On Sun, 2007-12-23 at 14:27 -0500, Jake B wrote:
> > > Could I get more info on /sys/power/state please?
> > >
> > > For a project where intelligent power consumption is such a large
> > > concern, I would expect this to be solid. Could anyone  weigh in on
> > > the status of suspend/resume on the XO, and perhaps explain why my
> > > G1G1 does not appear to implement this feature? Is it enabled in build
> > > 650, or did it not make it into the stable release?
> > > Please let me know. Thanks.
> > >
> > > Jake
> > >
> > >
> > > On Dec 23, 2007 1:45 PM, Jordan Crouse <jordan.crouse at amd.com> wrote:
> > > > On 23/12/07 08:29 -1000, Mitch Bradley wrote:
> > > > > Jake B wrote:
> > > > > > Are XO developers planning to implement support for
> > > > > > suspend-to-RAM/resume on the XO?
> > > > > > Please let me know. Thanks.
> > > > > >
> > > > > That feature is already implemented.  Press the power button and it
> > > > > suspends; press again to resume.  Lid closures do it too.
> > > >
> > > > And as always, /sys/power/state is available for your manual power
> > > > suspending needs.
> > > >
> > > > Jordan
> > > >
> > > > --
> > > > Jordan Crouse
> > > > Systems Software Development Engineer
> > > > Advanced Micro Devices, Inc.
> > > >
> > > >
> > > >
> >
> > > _______________________________________________
> > > Devel mailing list
> > > Devel at lists.laptop.org
> > > http://lists.laptop.org/listinfo/devel
> > --
> > Jim Gettys
> > One Laptop Per Child
> >
> >
> >
>