I confirm that the FN-key brightness controls now no longer work for me either under Feisty. They DID work under Edgy, without *any* modifications required, and without the need for me to compile or install any additional kernel modules or helper scripts. The FN-keys still work to control volume.
-- sony vaio FN keys and brightness not working https://launchpad.net/bugs/83660 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs