Alternately, you can run "sudo dpkg-reconfigure xserver-xorg" and disable the option from in there.
-- [feisty] xorg incorrectly detects "lv3:ralt_switch" option in xorg.conf https://launchpad.net/bugs/63365 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
