backlight device, suspend/resume...

Carsten Haitzler (The Rasterman) raster at
Wed Jul 9 13:22:04 CEST 2008

On Tue, 08 Jul 2008 18:51:25 -0400 Chris Ball <cjb at> babbled:

> Hi,
>    > Mike (mwester) wrote:
>    >> In practice, compromise is necessary.  Can we at least let the
>    >> kernel bring the backlight up to a level that would allow the user
>    >> to see vague outlines of something on the screen?  Or failing
>    >> that, can we make the backlight level on resume configurable in
>    >> some way?
>    > If you need this, why not set the backlight to "dim" instead of
>    > "off" before requesting the suspend ?
>    > The secret about successful kernel programming is to do as little
>    > as possible in the kernel :-)
> At OLPC, we're using a small userspace policy daemon called OHM¹ to make
> decisions like these -- when to dim, when to suspend, how to tell if the
> user is "idle".  I'd be happy to help get it running on the FR if it's
> wanted.

thanks.. though too late. already got ours going and integrated, tested and
working... :) dbus api is working, it's hyper small and simple.

Carsten Haitzler (The Rasterman) <raster at>

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