The issue can be fixed by the commit below. Please help to backport it to xenial.
commit 2b28b00a7e9ef21d3b94277e517692896e46e58c Author: Hans de Goede <hdego...@redhat.com> Date: Fri Oct 14 18:25:35 2016 +0200 power: The Power.Keyboard.Brightness property is in percent -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-settings-daemon in Ubuntu. https://bugs.launchpad.net/bugs/1827030 Title: Keyboard brightness control not working To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1827030/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs