8b52782ed4
GnomeRR needs that too. The backlight is exported as a normalized 0-100 value, or -1 if not supported. Clamping to HW limits is handled by the backend. Changing backlight uses a different method call, to avoid recomputing the full display configuration every time the user presses the backlight keys. https://bugzilla.gnome.org/show_bug.cgi?id=705670