Acer电脑Ubuntu 17启动故障求助：BootOrder not found循环重启

Hey there, let’s work through this boot loop issue together. I’ve run into similar problems after Ubuntu upgrades on Acer laptops that originally shipped with Windows 10, so here are targeted steps to get your system back up:

Step 1: Check BIOS/UEFI Boot Settings First #

This is the most common fix—Acer’s BIOS often resets boot priorities or disables UEFI entries after system upgrades.

• Reboot your machine and press the Acer BIOS key (usually F2 or Del; watch the boot screen for a prompt like "Press F2 to enter Setup").
• Navigate to the Boot tab:
  • Confirm your boot mode: If you installed Ubuntu in UEFI mode (which is likely since your laptop came with Windows 10), make sure the system isn’t stuck in Legacy mode.
  • Look for an Ubuntu/GRUB entry in the Boot Order list. If it’s missing, manually add it:
    • Find an option like Add Boot Option or Create New Boot Entry.
    • Browse to your EFI partition (it’s a small FAT32 drive, usually ~512MB) and select the file EFI/ubuntu/grubx64.efi.
    • Name the entry "Ubuntu" and move it to the top of the boot order.
• Save changes (press F10) and reboot to test.

Step 2: Repair GRUB from a Live USB #

If adjusting BIOS settings doesn’t work, we’ll fix the GRUB bootloader directly using your Legacy bootable USB:

1. Boot into the Ubuntu live environment from your USB.
2. Open a terminal (press Ctrl+Alt+T).
3. Identify your system partitions:
   • Run sudo fdisk -l to list all drives. Look for:
     • Your Ubuntu root partition (ext4 format, largest capacity—e.g., /dev/sda2).
     • Your EFI partition (FAT32, labeled "EFI System Partition"—e.g., /dev/sda1).
4. Mount the root partition:

   sudo mount /dev/sdXn /mnt
   

   Replace /dev/sdXn with your actual root partition (e.g., /dev/sda2).
5. Mount the EFI partition (only if you’re using UEFI mode):

   sudo mount /dev/sdXm /mnt/boot/efi
   

   Replace /dev/sdXm with your EFI partition (e.g., /dev/sda1).
6. Reinstall and update GRUB:

   sudo grub-install --root-directory=/mnt /dev/sdX
   sudo update-grub
   

   Note: /dev/sdX is your disk name (e.g., /dev/sda), not a partition number.
7. Reboot your machine and check if the boot loop is gone.

Step 3: Recreate the UEFI Boot Entry #

If GRUB repair doesn’t resolve the issue, the UEFI boot entry for Ubuntu might have been corrupted. Here’s how to rebuild it:

• From the Ubuntu live terminal (with EFI partition mounted at /mnt/boot/efi), run:

  sudo efibootmgr -c -d /dev/sdX -p m -L "Ubuntu" -l "\EFI\ubuntu\grubx64.efi"
  

  • Replace /dev/sdX with your disk (e.g., /dev/sda).
  • Replace m with your EFI partition number (e.g., 1 if it’s /dev/sda1).
• Verify the entry was added by running sudo efibootmgr—you should see "Ubuntu" listed in the boot order.
• Reboot and test.

Quick Troubleshooting Note #

If none of the above works, check if Secure Boot is enabled in your BIOS. Some Acer machines block GRUB when Secure Boot is turned on—try disabling it temporarily to see if that fixes the issue.

Let me know if you run into any roadblocks with these steps, or if you need clarification on any command!

内容的提问来源于stack exchange，提问作者user793806