[bug #65265] 100% of a core used while waiting for luks decription password in KVM

John Kirk <[email protected]> Sun, 11 Aug 2024 04:34:00 -0400 (EDT)

Newsgroups	gmane.comp.boot-loaders.grub.bugs
Message-ID	<[email protected]>

Follow-up Comment #1, bug #65265 (group grub):

I am a Debian 12 (released on June 10th, 2023) user running into the same
issue. (currently at 12.6)

During installation I opted for "full disk encryption" which includes /boot.
My situation is more cumbersome as I use a passively cooled computer without
any fans. Besides draining my energy bill the computer gets HOT! I've measured
160°F/71°C on the chassis (a big cooling block) which is still within spec,
but very undesirable over longer periods of time.

A desirable solution would be to idle and then suspend or power off after no
input for a given period.

My problem comes from: /boot/efi/EFI/Debian/grubx64.efi
--
Welcome to GRUB!

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

Packages installed:
--
ii  grub-common                            2.06-13+deb12u1                    
 amd64        GRand Unified Bootloader (common files)
ii  grub-efi-amd64                         2.06-13+deb12u1                    
 amd64        GRand Unified Bootloader, version 2 (EFI-AMD64 version)
ii  grub-efi-amd64-bin                     2.06-13+deb12u1                    
 amd64        GRand Unified Bootloader, version 2 (EFI-AMD64 modules)
ii  grub-efi-amd64-signed                  1+2.06+13+deb12u1                  
 amd64        GRand Unified Bootloader, version 2 (amd64 UEFI signed by
Debian)
ii  grub2-common                           2.06-13+deb12u1                    
 amd64        GRand Unified Bootloader (common files for version 2)
--

Apparently this problem was hinted at in:
https://lists.gnu.org/archive/html/help-grub/2022-11/msg00025.html


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