EFI

SecureBoot

If after installing Linux Mint in EFI mode, you are unable to boot due to a Secure Boot Violation, you can try one of the following solutions:

_images/secureboot-violation.jpg
  • Restart the installation:
    • Connect to the Internet before the installation
    • Do not select Install third-party software for graphics and Wi-Fi hardware, Flash, MP3 and other media.
  • Disable SecureBoot in the BIOS settings of your computer.

Note

For examples of how to disable secure boot on various computers, read Managing EFI Boot Loaders for Linux: Dealing with Secure Boot.

EFI boot order

If after installing Linux Mint in EFI mode, your computer skips the boot menu and boots straight into Windows (or another operating system), you probably have an issue with the boot order.

To modify the boot order:

  1. Boot Linux Mint in live mode (with your USB stick or DVD).
  2. Open a terminal.
  3. Type sudo efibootmgr.

This command lists the available boot options and the boot order.

_images/efibootmgr.png

In the screenshot above, there are three boot options:

  • ubuntu at 0000
  • linuxmint at 0001
  • Mac OS X at 0081

The boot order is 0081. This indicates that the computer only tries to boot Mac OS and not Linux Mint.

Important

For technical reasons Linux Mint uses ubuntu as its EFI boot name.

  1. To fix the boot order, type sudo efibootmgr --bootorder XXXX,YYYY (where XXXX and YYYY are the operating system boot options you want to boot).
_images/efibootmgr-2.png

In the screenshot above, sudo efibootmgr --bootorder 0000,0081 instructs the computer to first try to boot Linux Mint (ubuntu being the EFI boot name for Linux Mint), and then Mac OS.

  1. Restart the computer.

Note

In the screenshot above 0000 is the first boot option so the computer boots on the Linux Mint grub menu. If grub fails (or if it is dismissed with the exit command), the computer follows the boot order and then tries to boot 0081, which corresponds to Mac OS.