dpkg-reconfigure tzdata
# Fix grub
-apt-get purge grub-efi grub-efi-arm64 grub-efi-arm64-bin grub-efi-arm64-signed
-apt-get install grub-efi-arm64
-grub-install --removable /dev/nvme0n1p4
-# Set removable media to yes and nvram to no
-dpkg-reconfigure dpkg-reconfigure grub-efi-arm64
+# We deinstall grub-efi-arm64-signed- because it creates a file fbaa64.efi
+# which makes u-boot hang.
+apt-get install grub-efi grub-efi-arm64-signed-
+grub-install --target=arm64-efi --efi-directory=/boot/efi --removable
update-grub
-find /boot/efi -name fbaa64.efi | xargs rm
+# Set removable media to yes and nvram to no to make later grub updates work
+dpkg-reconfigure grub-efi-arm64
See also: https://github.com/AsahiLinux/docs/wiki/U-Boot