[Intel-gfx] BACKLIGHT property for KMS case

[Greg KH]

On Mon, Aug 17, 2009 at 05:52:28PM -0700, Jesse Barnes wrote:
> > - we should probably scale to cope with that, otherwise UI is going
> > to look weird.
> 
> 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...

It seems that HAL / gnome-display-manager, or something in that area,
wants to see only 8 different levels, otherwise you need to write a
custom script for it to use.  So be aware of this, I just changed the
samsung-backlight driver to use 0 - 7 to keep from having to do this.

thanks,

greg k-h