On Sat, Jun 15, 2013 at 08:29:42PM +0200, Daniel Vetter wrote:
Aside at the end: If the gnome tool indeed has its own backlight code and doesn't just use that as a fallback if the xrandr backligh property isn't available, then that's just a serious bug in gnome and should be fixed asap. But imo that's not something we should try to (nor do I see any way how to) work around in the kernel.
It's only used if there's no backlight property on the display.