See this from the Ubuntu Intrepid release notes:
http://www.ubuntu.com/getubuntu/releasenotes/810
Quote:
The X.Org configuration file (/etc/X11/xorg.conf) still has InputDevice entries for the mouse and keyboard, but they are ignored now because input-hotplug is used. The keyboard settings now come from /etc/default/console-setup; to change them please use sudo dpkg-reconfigure console-setup. After that, HAL and X need to be restarted (e.g., by rebooting your system).
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I don't know if it will fix your problem, but you could try backing up your xorg.conf first and then running:
Code:
sudo dpkg-reconfigure console-setup
and then reboot and see if it fixes the problem.