According to the XRANDR spec [1] the correct property is "Backlight".
[1] http://cgit.freedesktop.org/xorg/proto/randrproto/tree/randrproto.txt ** Package changed: gnome-settings-daemon (Ubuntu) => gnome-desktop3 (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/947919 Title: Can't change brightness with keyboard or with "Brightness and Lock" settings panel To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-desktop3/+bug/947919/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs