Adding the following line in the "Screen" section of xorg.conf solved the problem : Option "RegistryDwords" "EnableBrightnessControl=1" cf launchpad bug report 762670 (https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/762670)
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1075046 Title: [Dell Latitude E6430] FunctionKeys of brightness don't work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1075046/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs