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NachoGoro

Member

Registered: 2020-10-31

Posts: 21

[SOLVED] Cannot boot with GRUB: grub_is_lockdown not found

I had been having problems with Plasma and the latest nvidia drivers, and looking at the NVIDIA drivers installation guide I saw that new driver versions benefit from setting nvidia-drm.modeset and nvidia-drm.fbdev in the kernel.

I updated /etc/default/grub and ran:

grub-mkconfig -o /boot/grub/grub.cfg

Next time I rebooted, GRUB was not being recognized (black screen and quickly taken to the UEFI Settings).

I chroot'ed into the system, and reinstalled GRUB with:

grub-install --target=x86_64-efi --efi-directory=/boot/EFI --bootloader-id=GRUB

It reported to be successful, re-ran grub-mkconfig and rebooted.

Now it recognizes GRUB, but I get thrown into grub rescue:

error: symbol `grub_is_lockdown` not found.
Entering rescue mode...
grub rescue> 

Out of ideas at this point! Thanks in advance

Last edited by NachoGoro (2024-03-21 16:29:31)

Elixity

Member

Registered: 2023-10-29

Posts: 7

Re: [SOLVED] Cannot boot with GRUB: grub_is_lockdown not found

If you haven't already, I would remove the nvidia drm stuff from your GRUB config and then try again.

If you've done that and it doesn't work than I would see if the directory is

/boot/efi

instead of

/boot/EFI

because thats what it is on my system and I have had GRUB not work because of a silly mistake like that before.

Also in that

/boot/efi

directory I see another folder in all caps called

EFI

So maybe GRUB is freaking out because of having two folders called EFI but I doubt it

I'm tired and ready to go to bed right now so if I think of anything else I will probably follow up in the morning, if not I will follow up later.

Last edited by Elixity (2024-03-21 04:02:31)

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I play the trumpet!

NachoGoro

Member

Registered: 2020-10-31

Posts: 21

Re: [SOLVED] Cannot boot with GRUB: grub_is_lockdown not found

Thanks, Elixity.

I have triple-checked and in my machine it's /boot/EFI, not /boot/efi. Inside, it has Boot/, EFI/ GRUB/ and Microsoft/
I did remove the nvidia-drm stuff first thing as well, didn't make a change.

I'll re-chroot later and try to post logs (I took pictures with my phone now, but I should know better!)

Last edited by NachoGoro (2024-03-21 09:05:26)

Elixity

Member

Registered: 2023-10-29

Posts: 7

Re: [SOLVED] Cannot boot with GRUB: grub_is_lockdown not found

When you get the GRUB error is it when you try to boot your system in GRUB or is it when you select GRUB in your uefi boot menu?

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I play the trumpet!

M440

Member

Registered: 2023-08-24

Posts: 28

Re: [SOLVED] Cannot boot with GRUB: grub_is_lockdown not found

Thanks, Elixity.

I have triple-checked and in my machine it's /boot/EFI, not /boot/efi. Inside, it has Boot/, EFI/ GRUB/ and Microsoft/
I did remove the nvidia-drm stuff first thing as well, didn't make a change.

I'll re-chroot later and try to post logs (I took pictures with my phone now, but I should know better!)

where is EFI partition mounted? at /boot?

so you use?

grub-install --target=x86_64-efi --efi-directory=/boot/ --bootloader-id=GRUB

NachoGoro

Member

Registered: 2020-10-31

Posts: 21

Re: [SOLVED] Cannot boot with GRUB: grub_is_lockdown not found

Gah, that was it, thanks M440! That indeed fixed the issue, I can boot again! Thanks