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
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 grub.d/ 50-builddimg- settings. cfg TIMEOUT= 0.1 TIMEOUT_ QUIET=true LINUX_DEFAULT= "console= ttyS0" _TIMEOUT= 0 console /boot/vmlinuz- 5.8.0-54- generic root=PARTUUID= 797f2571- c983-48c6- 9f6f-7b36391ddd d3 ro console=ttyS0
Release: 20.10
Codename: groovy
ubuntu@ubuntu:~$ cat /etc/default/
GRUB_DEFAULT=0
GRUB_HIDDEN_
GRUB_HIDDEN_
GRUB_TIMEOUT=0.1
GRUB_CMDLINE_
GRUB_RECORDFAIL
GRUB_TERMINAL=
ubuntu@ubuntu:~$ cat /proc/cmdline
BOOT_IMAGE=
Focal
=====
ubuntu@ubuntu:~$ lsb_release -r -c grub.d/ 50-builddimg- settings. cfg TIMEOUT= 0.1 TIMEOUT_ QUIET=true LINUX_DEFAULT= "console= ttyS0" _TIMEOUT= 0 console /boot/vmlinuz- 5.4.0-74- generic root=PARTUUID= 182116e9- 0eda-43a0- beff-1e5acca758 89 ro console=ttyS0
Release: 20.04
Codename: focal
ubuntu@ubuntu:~$ cat /etc/default/
GRUB_DEFAULT=0
GRUB_HIDDEN_
GRUB_HIDDEN_
GRUB_TIMEOUT=0.1
GRUB_CMDLINE_
GRUB_RECORDFAIL
GRUB_TERMINAL=
ubuntu@ubuntu:~$ cat /proc/cmdline
BOOT_IMAGE=
Bionic
======
ubuntu@ubuntu:~$ lsb_release -c -r grub.d/ 50-builddimg- settings. cfg TIMEOUT= 0.1 TIMEOUT_ QUIET=true LINUX_DEFAULT= "console= ttyS0" _TIMEOUT= 0 console /boot/vmlinuz- 4.15.0- 20-generic root=PARTUUID= 8fbea74d- 4805-4438- 9bd6-f7725963fa a2 ro console=ttyS0
Release: 18.04
Codename: bionic
ubuntu@ubuntu:~$ cat /etc/default/
GRUB_DEFAULT=0
GRUB_HIDDEN_
GRUB_HIDDEN_
GRUB_TIMEOUT=0.1
GRUB_CMDLINE_
GRUB_RECORDFAIL
GRUB_TERMINAL=
ubuntu@ubuntu:~$ cat /proc/cmdline
BOOT_IMAGE=