The bug doesn't show anymore with Feisty Herd 2, at least on my system. However, neither of the suggested i8042 boot options brings back my keyboard and mouse on Dapper or Edgy.
-- PS2 keyboard problem https://launchpad.net/bugs/54836 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs