backlight device, suspend/resume...

Carsten Haitzler (The Rasterman) raster at
Tue Jul 8 18:09:29 CEST 2008

On Tue, 08 Jul 2008 17:04:14 +0100 Andy Green <andy at> babbled:

> Hash: SHA1
> Somebody in the thread at some point said:
> |> well right now the kernel does not bring the system back up in the
> state it
> |> left it in. that alone is broken. so it needs fixing. if it did, then
> the rest
> |> is a simple userspace problem.
> Well, if you're sure you thought it through and it's just the backlight
> level on resume that's the problem, when that's fixed everyone will be
> happy :-)

i have been thinking it through :) this will work fine - as before, for all
other cases (framebuffer level graphics, console, x when not blanked). and x
when blanked, on resume, with no other changes, will resume simply with the
screen off. you will need to press aux, power or touch the screen to activate
it... or have software tell x to come out of screenblank (easy).  that software
to tell it to "light up" exists - it just doesnt tell it to currently, but will
be doing so as soon as the kernel leaves things the way it found them :);)

Carsten Haitzler (The Rasterman) <raster at>

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