What does 'The boot of your PC is in EFI mode. Please change it to BIOS mode. Do you what to continue?' mean?

Asked by YannUbuntu on 2012-02-06

Originally posted here: http://ubuntuforums.org/showthread.php?t=1921010

Answer below:

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YannUbuntu (yannubuntu) said : #1

That means that your partition table is not EFI type, but your session is EFI type.

In this case, you have 2 choices:
- if you click "Yes", Boot-Repair will install grub-pc (GRUB2) as if the computer was not EFI.
- if you click "No", Boot-Repair will abort and exit.

YannUbuntu (yannubuntu) said : #2

I f you don't know which to choose, i would recommend the following:

1) first click "Yes", reboot and check if boot is repaired. (works when your computer is hybrid BIOS & EFI)
2) If still not good, that means that your computer absolutely needs a EFI partition. Please create a EFI partition , then run Boot-Repair again (optionally you can check in the Advanced options that your EFI partition is correctly detected).

YannUbuntu (yannubuntu) said : #3

I'll try to improve the dialog.

YannUbuntu (yannubuntu) said : #4

dialog changed to:
"The boot of your PC is in EFI mode, but no EFI partition was detected. You may want to retry after creating a EFI partition (FAT32, >200Mo, start of the disk}, EFI flag). Do you want to continue?"

YannUbuntu (yannubuntu) said : #5

This dialog has been removed from Boot-Repair