I decided to attempt a full disk encryption on the 2nd computer where I'm installing 14.04. It's a fresh installation. It used to contain a 12.04 version, but I opted for the "Erase disk and install Ubuntu" option.
I also added LVM (Logical Volume Management), don't think that matters in this context, but it is an option I included.
The problem I've run into is that my password is not accepted as correct when the installation has finished and I attempt to boot for the first time.
I've attempted to install it twice. First time, my password included some symbol characters that are located differently on US keyboards. Since I run into this kind of situation from time to time (having to type with my Norwegian keyboard as if it is a US keyboard), I know where the keys are located. So I tried typing it as if I have a US keyboard, but got the same result.
On the second attempt, I only included only numbers and upper/lower case characters in the password. There should be no keyboard layout issue for that password. But once again, the password was rejected and I was unable to continue.
The password is quite long, 20+ characters. Perhaps that is an issue?