Bug#1024720: d-i fails at grub when another installer is on disk

[Peter Palfrader <weasel@debian.org>]

Package: installation-reports
Severity: normal

Boot method: USB
Image version: firmware-testing-amd64-netinst.iso (https://cdimage.debian.org/cdimage/unofficial/non-free/cd-including-firmware/weekly-builds/amd64/iso-cd/; 2022-11-21)
Date: Wed, 23 Nov 2022 20:27:28 +0100

Machine: Lenovo Thinkpad X13 Yoga Gen3

This machine came with an Ubuntu Installer on disk, in nvme0n1p2.

This confused the grub on the installer image as it did not find the
correct root partition:

} grub> search --file --set=root /.disk/info
} grub> echo $root
} hd0,gpt2

As opposed to (cd0).

A workaround was to rename the .disk/info file on nvme0n1p2.

A fix might be if each installer image used and searched for a unique
file.

Cheers,
weasel
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