So, here are the steps to boot the VM manually: ls. # see list of available partitions # smth like (hd0) (hd0,2) (hd0,gpt1) set prefix=(hd0,gpt1)/boot/grub. set root=(hd0,gpt1) insmod normal. normal. Now, the “normal” grub shell starts, we continue: insmod linux. ls /.