How do I make GRUB the default bootloader instead of Windows Boot Manager on a UEFI laptop?
Once you’ve logged in, open a terminal and type sudo update-grub . This will run the os-prober script that GRUB uses to compile grub. cfg, which tells grub’s EFI file which entries to include, what colors to use, etc. The os-prober script should identify Windows Boot Manager, and automatically add it to the list.
What Is Legacy boot and UEFI?
Legacy boot is the boot process used by basic input/output system (BIOS) firmware. UEFI boot is the successor to BIOS. UEFI uses the globally unique identifier (GUID) partition table (GPT) whereas BIOS uses the master boot record (MBR) partitioning scheme.
Is there a way to chainload GRUB from UEFI?
The GNU GRUB documentation doesn’t even mention UEFI, and the Arch/Ubuntu/Gentoo wikis provide the bare minimal info to set up a basic (non-chainloading) install. I’ve installed GRUB onto my ESP using grub-install and grub-mkconfig .Test boot works. This means my /boot/grub folder is empty, and my ESP doesn’t need to be mounted during/after boot.
How do I install Grub for UEFI in legacy mode?
Reboot into Windows, and download/install a program called EasyUEFI and run it. You will see two buttons, click on the one that says “Manage EFI Boot Option”. Next, click on the second from top button in the middle column (tooltip should say something like “Create new entry.”). Select the grubx64.efi file, and change OS to “Linux/other”.
Where do I put grub install in Ubuntu?
Specifically, the EFI version of grub-install will put GRUB in EFI/ubuntu/grubx64.efi (perhaps with shimx64.efi in the same directory). You’ll have to copy files to the right location to get them to launch when you boot the computer.
How to get Grub to be the default bootloader?
Open Control Panel (Windows+X->Control Panel from the desktop in Windows 8+) (apparently Microsoft hates power users, so searching the Start Menu for “Control Panel” is now the fastest way to open it) Make sure the box that says “Turn on fast startup (Recommended)” at the bottom is not checked. More detailed instructions can be found here.