[Intel-gfx] Legacy backlight control with KMS and BACKLIGHT property

[Greg KH]

On Fri, Aug 14, 2009 at 02:03:02PM -0700, Keith Packard wrote:
> On Fri, 2009-08-14 at 13:45 -0700, Greg KH wrote:
> > But then what about all of the existing drivers already using the
> > /sys/class/blacklight interface?
> 
> The X server was wrapping this and exposing it as a RandR property, and
> so applications could rely on RandR for backlight control for a specific
> display. Of course, what we've mostly seen is applications just
> using /sys/class/backlight and not caring which monitor it was
> affecting.

So if individual drivers provide this interface, everything should be
fine, right?  With the exception of the dual-display issue, which is
a different problem.

thanks,

greg k-h