BCDEdit Dual Boot Ubuntu Different Drive

Instructing BCDEdit to Dual Boot Ubuntu Located on Different Drive

Abstract: This article provides instructions on how to modify the boot options in BCDEdit to dual boot Windows and Ubuntu, which are installed on different drives.

Created: 2025-01-24 by UserComp.com Editors

To modify the boot options to boot Ubuntu and Windows without changing the default boot options, you can use the EFI boot manager. Here's a step-by-step guide:

Boot your system.
Press the Shift key during boot to open the GRUB menu.
Select the Advanced options for Ubuntu option.
Choose the Ubuntu option from the list that appears.
At the boot prompt, type e to edit the boot options.
Locate the line that starts with linux. It should look something like this:

linux /vmlinuz-5.13.0-36-generic root=UUID=<your_uuid> ro quiet splash

Add efi_boot=off at the end of the line to disable secure boot:

linux /vmlinuz-5.13.0-36-generic root=UUID=<your_uuid> ro quiet splash efi_boot=off

Press Ctrl+X to save and exit.
Press Enter to boot Ubuntu with secure boot disabled.
To boot Windows, repeat the process but do not add efi_boot=off to the boot options.

Remember to save your changes permanently by editing the GRUB configuration file. You can do this by opening a terminal and typing:

sudo nano /etc/default/grub

Find the line that starts with GRUB_CMDLINE_LINUX_DEFAULT, add efi_boot=off at the end, and save the file. Then, update GRUB by typing:

sudo update-grub

This method allows you to boot both Ubuntu and Windows without changing the default boot options.

References:

Tags: Linux Windows BCDEdit Dual Boot

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