It looks like the kernel patch is included in edgy. I dunno if the corresponding userspace[1] is included in the distro... for sure it isn't on by default since the keys do not work here.
[1] either the ugly standalone daemon or a proper solution integrated with hal, gnome-power-manager etc -- FN keys not working on vaio VGN-FS215E https://launchpad.net/bugs/6628 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
