[Software] EFI/GRUB (grubx64.efi) gets HOT

[Easy]

Hello,

I recently traded in Microsoft Windows for Debian 12. Yay me! However being a bit of moron naturally (that cannot be helped) I have run into a problem I cannot solve myself. Let me elaborate:

When it comes to computers I hate any noise that they produce which is a bit OCD I admit. Therefore I have bought a passively cooled computer without any fans at all. After installing Debian 12 with FDE I am prompted by GRUB to enter a password (that takes forever to unlock but that's beside the point). If you enter the password the Debian boots and everything is great. If you enter a wrong password you are dumped into the grub command line which triggers my self induced Tourette syndrome with cursing and ctrl-alt-del pressing ticks. I can live with that since its my fault it tripped over my own fingers typing the password anyway.

However the problem arises when I do not enter a password at all. Besides eating away at my power bill my computer becomes very hot and therein lies the problem. I would have liked it to either shutdown or go into standby, but it does not. (standby/idle works fine after Debian has booted)

So, what can I do about this?

[werta]

You can adjust GRUB timeout settings:

sudo nano /etc/default/grub

GRUB_TIMEOUT=5
GRUB_HIDDEN_TIMEOUT=0

sudo update-grub

Also, if you don't need the GRUB password prompt for security, you can disable it by removing the GRUB_PASSWORD line in /etc/default/grub and updating GRUB with sudo update-grub.

[Easy]

Your post count is pretty low, so I'll be waiting for a more seasoned forum member to confirm your advice or give his own. Appreciate the feedback though, but this is about the EFI/grubx64.efi part of the boot process. The part you describe comes after that and is of no use in my situation afaict.

To explain further for anyone reading along, it looks like this:

Code: Select all

Welcome to GRUB!

Attempting to decrypt master key...
Enter passphrase for <disk>,<partition> (UUID string):  

This is where it gets hot, after a while.

The configuration resides in /boot/efi/EFI/Debian/grub.cfg

[Aki]

Hello,

It looks like a known grub issue:

• 100% CPU before LUKS password

You can ask upstream, I suppose.

[Easy]

Thank you, that was exactly what I was looking for.