Does the alternate installer's "Guided - use entire disk and set up encrypted LVM" use LUKS or plain dm-crypt?
wiki.ubuntuusers.de says if I want to use TRIM on an encrypted SSD, I need at least cryptsetup 1.4 and kernel 3.1. Do I need this, when creating the partitions and setting up encryption, or is upgrading afterwards enough?
TrueCrypt on Windows can auto mount volumes that use the same passphrase as the boot volume. You enter the passphrase only once. Is there a way to do this with LUKS?
Background: I'm currently migrating from Windows to Ubuntu. I set up Ubuntu 11.10 with LUKS full disk encryption. I use a second hard drive that is still a TrueCrypt NTFS volume. I want to change that.