If you want to do your own tests, the mini.iso can be downloaded via: https://salsa.debian.org/philh/grub-installer/-/jobs/4582667/artifacts/file/debian/output/debian-202306XX+salsaci+20230820+228-amd64-gtkmini.iso
Hello, I download it and tested it in a QEMU VM. I tested it two times: with and without UEFI enabled. I can report that installation succeeded in both cases.
Here are logs obtained post-install with 'grep grub-installer:
/var/log/installer/syslog', in case it's useful
With UEFI enabled:
Success mounting /target/proc
Success mounting /target/sys
Success mounting /target/sys/firmware/efi/efivars
info: architecture: amd64/efi
info: Identified partition label for /dev/sda2: gpt
dpkg: warning: ignoring request to remove grub which isn't
installed
dpkg: warning: ignoring request to remove grub-legacy which isn't
installed
dpkg: warning: ignoring request to remove grub-pc-bin which isn't
installed
dpkg: warning: ignoring request to remove grub-pc which isn't
installed
info: initial os-prober call found the following OSes:
info:
info: Found NO other OSes, triggering question about os-prober,
default false
info: Additionally installing shim-signed to go with
grub-efi-amd64
info: Installing grub on 'dummy'
info: grub-install does not support --no-floppy
info: Running chroot /target grub-install --force "dummy"
Installing for x86_64-efi platform.
Installation finished. No error reported.
info: grub-install ran successfully
Without UEFI:
info: architecture: amd64/generic
info: Mounting /proc into /target
info: Identified partition label for /dev/sda1: msdos
dpkg: warning: ignoring request to remove grub which isn't
installed
dpkg: warning: ignoring request to remove grub-legacy which isn't
installed
dpkg: warning: ignoring request to remove grub-efi which isn't
installed
dpkg: warning: ignoring request to remove grub-efi-amd64-bin which
isn't installed
dpkg: warning: ignoring request to remove grub-efi-amd64-signed
which isn't installed
dpkg: warning: ignoring request to remove grub-efi-amd64 which
isn't installed
dpkg: warning: ignoring request to remove grub-efi-ia32-bin which
isn't installed
dpkg: warning: ignoring request to remove grub-efi-ia32 which
isn't installed
info: initial os-prober call found the following OSes:
info:
info: Found NO other OSes, triggering question about os-prober,
default false
info: Installing grub on '/dev/sda'
info: grub-install does not support --no-floppy
info: Running chroot /target grub-install --force "/dev/sda"
Installing for i386-pc platform.
Unknown device "/dev/sda1": No such device
Unknown device "/dev/sda1": No such device
Unknown device "/dev/sda1": No such device
Unknown device "/dev/sda2": No such device
Unknown device "/dev/sda5": No such device
Unknown device "/dev/sda1": No such device
Unknown device "/dev/sda1": No such device
Unknown device "/dev/sda1": No such device
Unknown device "/dev/sda1": No such device
Installation finished. No error reported.
info: grub-install ran successfully
Cheers,
-- Arnaud Rebillout / OffSec / Kali Linux Developer