Repair

Reinstall GRUB after BIOS Update on LUKS encrypted system

Source: sowhatisthesolution.wordpress.com

cryptsetup luksOpen /dev/sda3 sda3_crypt
sudo lvscan
sudo mount /dev/ubuntu-vg/root /mnt
sudo mount /dev/sda2 /mnt/boot
for i in /dev /dev/pts /proc /sys /run ; do sudo mount -B $i /mnt$i ; done
sudo mount -o bind /etc/resolv.conf /mnt/etc/resolv.conf
sudo mount /dev/sda1 /mnt/boot/efi/
sudo chroot /mnt /bin/bash
sudo grub-install /dev/sda
update-initramfs -c -k all