ofw syscons brightness patch

[Super Bisquit]

On Thu, Sep 22, 2011 at 5:17 PM, Miod Vallat <miod at online.fr> wrote:

> > +             /* Scale by 17, so it's a range of 0-12.  Also, from
> OpenBSD's source,
> > +              * 0x34 is the minimum brightness allowed before the
> backlight shuts off.
>
> I wrote that code long ago. It was tested on an early iBook G3, and
> found out to not work (i.e. the OFW method does nothing or does not
> exist) on most of the TiBook and recent iBook of the 2002-2005 years.
>
> I have no idea if more recent models behave any better, but in any case
> do not expect this to work on all systems.
>
> Miod
>
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Has the code been tested on iMacs or PowerMacs?