I have noticed the same problem. However, if you disable the Ubuntu splash screen, the text based password prompt will allow backspace to function at the password prompt.
-- Backspace/delete problem at boot-time entering hard disk encryption password https://bugs.launchpad.net/bugs/175282 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
