… by restoring GRUB for crypted disks

After system update and reboot, GRUB failed with this error symbol 'grub_calloc' not found.

  • fix it with these commands
1fsck /dev/nvme0n1p*
2efibootmgr -c --disk /dev/nvme0n1
3efibootmgr -v /dev/nvme0n1

  • check in your BIOS if EFI boot is always configured (link to /boot/efi/EFI/arch/grubx64.efi)

  • in bonus, if you want to mount your crypted system

 1cryptsetup open /dev/nvme0n1p3 data
 2pvs
 3vgs
 4vgchange -ay
 5lsblk -fs
 6mount /dev/mapper/arch-root /mnt/
 7mount /dev/mapper/arch-home /mnt/home/
 8mount /dev/nvme0n1p2 /mnt/boot/
 9mount /dev/nvme0n1p1 /mnt/boot/efi/                                                # for UEFI systems
10arch-chroot /mnt