There is a difference in how the new Apple Magic Keyboard sends the key data for its Fn key compared to the old keyboard. I've added a comment on the existing kernel bug for this issue [1].
[1]: https://bugzilla.kernel.org/show_bug.cgi?id=99881#c14 ** Bug watch added: Linux Kernel Bug Tracker #99881 http://bugzilla.kernel.org/show_bug.cgi?id=99881 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1558646 Title: Apple Magic Keyboard A1644 fn key does not work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1558646/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs