following this guide:
https://wiki.parabola.nu/Installing_Parabola_on_Libreboot_with_full_disk_encryption_(including_/boot)

this is essentially the error I get when I try to do full disk encrypion on libreboot with /boot encrypted...

:: running early hook [udev]
…
:: running early hook [lvm2]
…
:: running hook [encrypt]
Waiting 10 seconds for device /dev/aether/core ...
[ 4.250559] sd 4:0:0:0: [sdb] No Caching mode page found.
[ 4.250612] sd 4:0:0:0: [sdb] Assuming drive cache: write through
ERROR: device '/dev/aether/core/' not found. Skipping fsck.
:: mounting '/dev/aether/core' on real root
mount: you must specify the filesystem type
You are now being dropped into an emergency shell.
sh: can't access tty; job control turned off
[rootfs ]#

this error I speak of has happened to others too...

here is an example https://www.reddit.com/r/Parabola/comments/6ytkkz/parabola_on_fully_encrypted_disk_fails_to_boot/

I put it here because it is both a bug in documentation and requires some fixing. I am using an x200 with the latest libreboot update.