I can confirm the same problem on a Toshiba A100-TA6, where in Edgy the right Alt key does not work, and gives ISO_Level3_Shift.
Commenting out the XkbOptions line in /etc/X11/xorg.conf solved this problem. -- [Edgy] xorg incorrectly detects "lv3:ralt_switch" option https://launchpad.net/bugs/63365 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
