We simply hadn't merged a quite recent enough version from Debian, which happens sometimes. This is fixed in more recent Ubuntu releases. See for example:
https://help.ubuntu.com/7.10/installation-guide/i386/mount-encrypted- volumes.html ** Changed in: installation-guide (Ubuntu) Status: New => Fix Released -- Installation Manual: mounting dm-crypt partitions info missing https://bugs.launchpad.net/bugs/119721 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
