i am using a fully encrypted LVM disk and running Ubuntu 17.10 Stable. Until recently it was working fine:
grub - decryption password input - boots to OS
grub - busy box "gave up waiting for root device"
I have tried both suggestions on this page:
suggestion 1: "run cryptsetup from within busybox" did not work because cryptsetup is not a recognised command
suggestion 2: "boot from usb, manually decrypt/mount and run update-initramfs", did not show any issues, i was able to go through all steps without issues, but nothing seems to have changed after rebooting. (note: i also confirmed (while in the chroot) that /etc/crypttab exists and it has an entry for sda5_crypt). also tried running update-grub.
Any suggestions? Thanks!