Comment 3 for bug 1276739

Revision history for this message
Dimitri John Ledkov (xnox) wrote : Re: kubuntu encrypted lvm install fails

So the only change in the partman-crypto for 12.04.4 is to start using aes-xts-plain64 cipher to protect installations from the pre-imaging attack.

From the syslog:
Feb 6 00:52:00 partman-crypto: kernel entropy_avail: 181 bits
Feb 6 00:52:12 partman-crypto: device-mapper: reload ioctl failed: No such file or directory
Feb 6 00:52:12 partman-crypto:
Feb 6 00:52:12 partman-crypto: Failed to setup dm-crypt key mapping for device /dev/sda5.
Feb 6 00:52:12 partman-crypto: Check that kernel supports aes-xts-plain64 cipher (check syslog for more info).
Feb 6 00:52:12 partman-crypto: Failed to write to key storage.

Which for the kubuntu kernel Linux version 3.2.0-58-generic (buildd@allspice) it appears to not be available at the install time.

Based on above i presume flavors that use hwe kernels are not affected.