[K12OSN] Fix for "Indigo" Mac video

[Jim Kronebusch]

> > I tested all of the differences in Jim Kronebusch's XF86Config-4.indigo
> > and found that the magic is in setting UseFBDev to true in the video
> > driver section (see attached patch).
> >
> > This does not appear to break the half-dozen Macs I tested on, so
> > hopefully we'll be able to just add this to the defaults. I should
> > also wrap it in a 'if [ `uname -m` = "ppc" ]' ...
> >
> > I'll build a new ltsp_ppc package with this change for further
> > testing.
> 
> I'm making this too hard on myself. The simple solution is to add
> this line to the Default section of lts.conf:
> 
>  	X_DEVICE_OPTION_01 = "UseFBDev\" \"true"

Very cool.  I was hoping if I posted the custom file someone with more
knowledge than myself would be able to pull the one little piece from it and
simplify things.

I already installed a server as a demo with some existing Blueberry iMacs last
Friday.  Hopefully they will decide to make the switch over the summer.  

All of these additions should make K12LTSP a simple solution for mac based
schools.

Thanks again for the extra work.

Now for sound.......... :-)

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