I am using grub-mkrescue to create an iso image out of my kernel.
This works fine in an emulator but once I use rufus to burn the iso image to a usb it refuses to boot.
The grub menu comes up fine but gives me "error: symbol 'grub_efi_secure_boot' not found'.
I tried messing around in the bios options for my laptop but I cant find anything that relates to secure boot.
Any help would be appreciated.
"symbol grub_efi_secure_boot not found" on hardware
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- Posts: 1
- Joined: Mon Aug 13, 2018 7:55 am
Re: "symbol grub_efi_secure_boot not found" on hardware
I had the exact same error just last night, what a coincidence
What I did was burn the image using Rufus's DD image mode, that fixed the issue for me.

What I did was burn the image using Rufus's DD image mode, that fixed the issue for me.
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- Posts: 3
- Joined: Sun Apr 30, 2017 7:19 am
Re: "symbol grub_efi_secure_boot not found" on hardware
I have the exact same problem. What is Rufus's DD image mode?
PS: okay I found lol many thanks
PS: okay I found lol many thanks
Re: "symbol grub_efi_secure_boot not found" on hardware
"Computers are to solve problems that wouldn't exists without computers"
Wise words... This is going to happen to you over and over again if you're not using a POSIX system for development! A Linux or BSD would have had "dd" and "cdw" at your disposal
Cheers,
bzt
Wise words... This is going to happen to you over and over again if you're not using a POSIX system for development! A Linux or BSD would have had "dd" and "cdw" at your disposal

Cheers,
bzt