Comment 1 for bug 293754

By the way, I did the 8.04 route. I seem to have forgotten that it didn't setup the dm_crypt root properly either, basically forgoing the creation of /etc/crypttab. Manually creating that and running mkinitrd again fixes the bootup from the encrypted root. That part of the problem is probably the same still.

What I did recall correctly is that 8.04 didn't suffer from the problem of creating a spurious device mapper "partition" before being able to create an LVM PV on the encrypted volume (though I was also correct in that the installer wanted to make believe we were doing that).