Password prompt for encrypted root doesn't appear.
All I see is a cursor on a blank screen.
When I press alt-tab, screen is switched to "normal view" and I can see the password prompt. Another problem is, that alt-tab generates a character which is passed to this prompt.
radeon (ATI Technologies Inc Radeon Mobility X1400) with nomodeset
*** This bug has been marked as a duplicate of bug 527426 ***