[ubuntu] Keyboard/Mouse disabled at login screen

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http://ubuntuforums.org – I switched on my laptop this morning (HP Compaq nc6320) as usual and tried to log in, only to find that neither trackpad nor keyboard were working! If I reboot into a recovery mode shell, the keyboard works until I move on to normal boot. If I boot from an Ubuntu install disk (run from CD), both trackpad and keyboard work. Everything seemed OK last night when I shut down. It seems as if something is disabling keyboard and mouse (or not enabling them) as the GUI loads. Any advice would be welcome. I'm running Jaunty 9.04. (Hardware)