首先,仅对UEFI有效

这个问题常出现在全新安装中,比如虚拟机

问题原因在于需要开启boot分区的“bootable flag”

开启方法:

  1. 挂载boot分区
    1. mount /dev/sda1 /boot
  2. 使用“parted”工具,“set 1 boot on”
  3. 重新执行“grub-install”与“grub-mkconfig”:
    1. grub-install –target=x86-64-efi –efi-directory /boot –bootloader-id=GRUB
    2. grub-mkconfig -o /boot/grub/grub.cfg

相关介绍:

  1. A boot flag is a 1-byte value in a non-extended partition record, within a master boot record. It appears at the beginning of a partition record, as the value 0x80. A value of 0x00 indicates the partition does not have the boot flag set.[1][2] Any other value is invalid.

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原文链接:https://blog.csdn.net/ytingone/article/details/82819429