Power manager specification... (request for comments).

Yuan Chao yuanchao at gmail.com
Wed Aug 15 19:23:10 EDT 2007

On 8/16/07, Jim Gettys <jg at laptop.org> wrote:

> Fpr general comment and discussion, the following is a list of things
> cjb and I think should happen.  What are we missing?  Other opinions?
I'm not an expert here, but I'd like to share some ideas. How about
sorting these events into catagories like "on AC power", "on battery"?
Though XO doesn't use ACPI as most recent notebook PCs do, we can
still refer to some existing ACPI scripts as most events are in

> o On momentary power button:
>   turn off screen, suspend machine, leave keyboard and wireless on;
> keyboard/touchpad will cause instant on again.
I'm curious here that I thought the wireless needs CPU to work with.
Why suspend the machine and leave the wireless on?

> o on lid close, on power, leave the machine on and running.
Even though it's on AC power, maybe the screen can also be turned off
to be more Eco?

> o On ebook mode, should turn off keyboard
> o On lid open, should reset keyboard
There seems to be no way to manually adjust the backlight level in
ebook mode. What would be the policy for it? Leave it on all the time
or dim down after some idle time? Also CPU (and wireless?) should go
to suspend for most of time in ebook mode?

> o rotate should probably be done by OHM.
There seems no way to predict which direction to go in ebook mode as
no position sensor. Here you mean restore the rotation after get back
from ebook mode?

Best regards,
Yuan Chao

More information about the Devel mailing list