Are those keys detected at all in the system? It could even be a kernel issue. Could you please look at https://wiki.ubuntu.com/Hotkeys/Troubleshooting ; and provide the info pointed there to the report? Thanks.
** Changed in: gnome-control-center (Ubuntu) Importance: Undecided => Low ** Changed in: gnome-control-center (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/893851 Title: Brightness adjustment gauge in gnome-control-center screen not responding to brightness hot-keys Status in OEM Priority Project: New Status in “gnome-control-center” package in Ubuntu: Incomplete Bug description: For systems equipped with hot keys to adjust screen brightness, the brightness gauge in "gnome-control-center screen" is not responding to brightness hot-key actions. To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/893851/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp