Comment 7 for bug 1915571

I built the following images using the version in -proposed and it worked as expected.

Concerning the autopkgtest regression, I think it is unrelated with this change. It seems to be related to openstack and nova setup.

Groovy
======

ubuntu@ubuntu:~$ lsb_release -c -r
Release: 20.10
Codename: groovy
ubuntu@ubuntu:~$ cat /etc/default/grub.d/50-builddimg-settings.cfg
GRUB_DEFAULT=0
GRUB_HIDDEN_TIMEOUT=0.1
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=0.1
GRUB_CMDLINE_LINUX_DEFAULT="console=ttyS0"
GRUB_RECORDFAIL_TIMEOUT=0
GRUB_TERMINAL=console
ubuntu@ubuntu:~$ cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-5.8.0-54-generic root=PARTUUID=797f2571-c983-48c6-9f6f-7b36391dddd3 ro console=ttyS0

Focal
=====

ubuntu@ubuntu:~$ lsb_release -r -c
Release: 20.04
Codename: focal
ubuntu@ubuntu:~$ cat /etc/default/grub.d/50-builddimg-settings.cfg
GRUB_DEFAULT=0
GRUB_HIDDEN_TIMEOUT=0.1
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=0.1
GRUB_CMDLINE_LINUX_DEFAULT="console=ttyS0"
GRUB_RECORDFAIL_TIMEOUT=0
GRUB_TERMINAL=console
ubuntu@ubuntu:~$ cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-5.4.0-74-generic root=PARTUUID=182116e9-0eda-43a0-beff-1e5acca75889 ro console=ttyS0

Bionic
======

ubuntu@ubuntu:~$ lsb_release -c -r
Release: 18.04
Codename: bionic
ubuntu@ubuntu:~$ cat /etc/default/grub.d/50-builddimg-settings.cfg
GRUB_DEFAULT=0
GRUB_HIDDEN_TIMEOUT=0.1
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=0.1
GRUB_CMDLINE_LINUX_DEFAULT="console=ttyS0"
GRUB_RECORDFAIL_TIMEOUT=0
GRUB_TERMINAL=console
ubuntu@ubuntu:~$ cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-4.15.0-20-generic root=PARTUUID=8fbea74d-4805-4438-9bd6-f7725963faa2 ro console=ttyS0