I have the same problem with Feisty fawn and dm-crypt is ok. Message : "Incompatible libdevmapper 1.02.08 (2006-07-17)(compat) and kernel driver" (my kernel is 2.6.20-2-generic, but same problem with previous version).
There is a solution at http://www.spinics.net/lists/dm- crypt/msg00051.html, but this is too complicate to use (apparently mkinitramfs doesn't have cryptsetup support). -- libdevmapper incompatible with cryptsetup kernel driver https://launchpad.net/bugs/64625 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
