Description: Dropped into initramfs and keyboard doesn't work
https://www.reddit.com/r/linuxmasterrace/comments/pnwxqo/dropped_into_initramfs_and_keyboard_doesnt_work/
How to solve the problem:
Force the machine off, boot from external USB, chroot into Ubuntu, and reinstall grub from there.
https://askubuntu.com/questions/831216/how-can-i-reinstall-grub-to-the-efi-partition