I noticed this behavior too using my custom Xubuntu setup with GRUB
folder located in the /boot folder inside the LUKS-encrypted ext4 rootfs
partition. Grub was setup with GRUB_ENABLE_CRYPTODISK=y. The grub binary
at /boot/efi/EFI/ubuntu/grubx64.efi seems to be causing my CPU fan to
spin while waiting at the initial password prompt (before the rootfs is
decrypted).
On 11/20/22 04:17, Tim Lewis wrote:
While some Linux distributions (Debian, Fedora, etc) put /boot outside of LUKS,
the ones using the Calamares installer (EndeavourOS, Spiral, etc)
often put /boot inside LUKS/btrfs.
The latter layout permits kernel rolebacks via btrfs snapshots, but
will use 100% of one core until the kernel is loaded.
This is easy to reproduce and observe in KVM.
Is Calamares missing a GRUB configuration or is this a bug?
