Having two key slots is normal. One is your passphrase and the other is the keyfile.
What i would do is if you can boot into a tty or chroot into the system otherwise is uninstall the nvidia drivers with sudo nvidia-installer-dkms -n
This will remove the nividia drivers and install the opensource nouveau drivers
update
Update, I did a reinstall using calamares. This time I used a swapfile. No keyfile error.
So itās the swap partition.
Iām gonna just chill with the swapfile. But at least Iāve narrowed it down to a partition
Iām starting to think it may be the mounting of subvolumes that is the issue.
Ie itās looking for a keyfile prior to the subvolumes being mounted and accessible⦠Or at least thatās what Iām going with.
Correct me this assumption is wrong, but if say the keyfile was deleted, wouldnāt the system hang on decryption post grub unlock?
Itās odd as I neevr had this problem using the copy and paste instructions. This was however my first go using the installer with btrfs