Comment 0 for bug 1991471

I am using the installer in the released image of Xubuntu 22.04.1 (jammy). The ubiquity version is 22.04.17.

The system supports UEFI, but this is disabled. /sys/firmware/efivars/ is absent, and no EFI partition is present. syslog even shows this line:

    Oct 2 04:20:23 xubuntu 05efi: debug: Not on UEFI platform

I use the "Something else" option for partitioning, and set up swap, /, and /home partitions.

The install then fails with

    ==== Unable to install GRUB in /dev/sda ====

    Executing 'grub-install /dev/sda' failed.

    This is a fatal error.

Here is the relevant excerpt from syslog:

    Oct 2 04:20:24 xubuntu grub-installer: info: Identified partition label for /dev/sda3: msdos
    Oct 2 04:20:24 xubuntu grub-installer: info: Installing grub on '/dev/sda'
    Oct 2 04:20:24 xubuntu grub-installer: info: grub-install does not support --no-floppy
    Oct 2 04:20:24 xubuntu grub-installer: info: Running chroot /target grub-install --force --target x86_64-efi "/dev/sda"
    Oct 2 04:20:24 xubuntu grub-installer: Installing for x86_64-efi platform.
    Oct 2 04:20:36 xubuntu grub-installer: grub-install: error: cannot open `/boot/efi/EFI/ubuntu/grubx64.efi': No such file or directory.
    Oct 2 04:20:36 xubuntu grub-installer: error: Running 'grub-install --force --target x86_64-efi "/dev/sda"' failed.

The installer appears to be attempting to install grub-efi-amd64 instead of grub-pc, despite having correctly identified the system as non-EFI earlier.