After upgrading to Ubuntu 11.10, neither my keyboard nor my mouse work anymore. The keyboard works during the boot process, but stops working as soon as the login screen appears. I'm stuck there because without a mouse or a keyboard I can't login or start a shell. If I hit ESC during startup to make the grub manager appear, the manager appears, but the keyboard won't work anymore. Mouse: Logitech RX 250, Keyboard: Cherry RS 6000