What are the default .efi files installed 18.1

Questions about Grub, UEFI,the liveCD and the installer
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MikeOsburn
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What are the default .efi files installed 18.1

Post by MikeOsburn » Tue Jan 24, 2017 10:57 am

I have installed it twice on the same machine. First time there was fwupx64.efi and a folder labeled FW.

On a fresh install these files were not installed.

What precisely are the default .efi boot files on a standard Mint 18.1 installation?

fabien85
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Re: What are the default .efi files installed 18.1

Post by fabien85 » Wed Jan 25, 2017 9:14 am

fwupx64.efi is a EFI utility to upgrade the firmware when a new one is released by the manufacturer. It only works for some computer brands as far as I understand.
It's not a big deal if you don't have it. You can always upgrade the computer firmware manually.

Say your EFI Partition is mounted at /boot/efi (which it should normally).
The important EFI files are :
/boot/efi/EFI/ubuntu/shimx64.efi and /boot/efi/EFI/ubuntu/grubx64.efi

Explanations :
- grub is the bootloader
- shim is a preloader to deal with secure boot. It's just there to comply with the signature requirement, then it chainloads to grub.
- you may have a /boot/efi/EFI/ubuntu/grub.cfg that's ok. That's a config file to indicate to grub where it should look for the linux install (=on which partition), in cases where this may not be obvious (e.g. dual-boot, many partitions...)

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