[Intel-gfx] BACKLIGHT property for KMS case

[Matthias Hopf]

On Aug 18, 09 03:01:22 +0100, Matthew Garrett wrote:
> On Mon, Aug 17, 2009 at 05:52:28PM -0700, Jesse Barnes wrote:
> > The VBIOS handles it by making anything below the min brightness
> > equivalent to "lowest", which is probably fine.  Scaling would work too
> > though.  Also, the PWM write is wrong for a range of 0-255, so I need
> > some scaling anyway...
> 
> The problem with having them all at "lowest" is that you'll get a bunch 
> of "low" brightness levels in the UI that all result in the same 
> brightness. It's not a technical issue but it looks kind of ugly, so I 
> think we need to set the zero point to the lowest value and reduce 
> max_brightness accordingly.

IMHO the sanest would be to define 1 to be the minimum brightness and 0
to switch the light off completely.

Another 2 cents

Matthias

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