I know this has been asked before,but I don't have the technical know-how to perform any of the fixes nor do I know where to start. I turn my laptop on and it boots up to the GNU Grub whereas before it would just boot up automatically to Ubuntu then I choose Ubuntu and the statement "cryptsetup: Waiting for encrypted source device UUID=XX...." and then it goes into the busybox shell so then what would I do then?
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I had exactly the same error message / behavior on my Dell XPS15 P56F - the issue was that the system configuration was set for SATA operation to RAID instead of AHCI. Somehow that got changed by itself, Maybe because the battery died and I didn’t use the computer for a while and hence all power supply went completely flat.
reboot and go to BIOS using "fn and F2" or "F12" Go to ‘System Configuration’ > ‘Sata Operation’ > switch to "AHCI" from "RAID On"
The credit for this solution goes to this user: https://askubuntu.com/a/1259221
