Ubuntu 8.10 Intrepid, 32-bits.
First, switch to a text console , e.g. console_4
with <ctrl><alt><f4>. Login as root.
Then use loadkeys and assign the SAK key to
e.g. <ctrl><alt><break>.
Finally, press the SAK key. Result:
attempt to kill init
kernel panic
Can be reproduced anytime.
-- frank