Comment 11 for bug 1792948

I was not able to recreate this issue on P8 with proposed enabled..

ubuntu@P8lpar2:~$ uname -a
Linux P8lpar2 3.13.0-164-generic #214-Ubuntu SMP Wed Dec 5 10:40:29 UTC 2018 ppc64le ppc64le ppc64le GNU/Linux

ubuntu@P8lpar2:~$ sudo apt dist-upgrade -y --assume-yes

.....

Progress: [ 86%] [###################################################.......] Setting up grub-common (2.02~beta2-9ubuntu1.16) ...
Progress: [ 87%] [###################################################.......] Setting up grub2-common (2.02~beta2-9ubuntu1.16) ...
Progress: [ 88%] [####################################################......] Setting up grub-ieee1275-bin (2.02~beta2-9ubuntu1.16) ...
Progress: [ 89%] [####################################################......] Setting up grub-ieee1275 (2.02~beta2-9ubuntu1.16) ...
Progress: [ 90%] [#####################################################.....] Installing for powerpc-ieee1275 platform.
Installation finished. No error reported.
Generating grub configuration file ...
Warning: Setting GRUB_TIMEOUT to a non-zero value when GRUB_HIDDEN_TIMEOUT is set is no longer supported.
Found linux image: /boot/vmlinux-3.13.0-165-generic
Found initrd image: /boot/initrd.img-3.13.0-165-generic
Found linux image: /boot/vmlinux-3.13.0-164-generic
Found initrd image: /boot/initrd.img-3.13.0-164-generic
Found linux image: /boot/vmlinux-3.13.0-163-generic
Found initrd image: /boot/initrd.img-3.13.0-163-generic
done
Setting up landscape-common (14.12-0ubuntu6.14.04.4) ...
Progress: [ 91%] [#####################################################.....] Setting up landscape-client (14.12-0ubuntu6.14.04.4) ...
ubuntu@P8lpar2:~$

ubuntu@P8lpar2:~$ sudo apt-cache policy grub-ieee1275
grub-ieee1275:
  Installed: 2.02~beta2-9ubuntu1.16
  Candidate: 2.02~beta2-9ubuntu1.16
  Version table:
 *** 2.02~beta2-9ubuntu1.16 0
        500 http://ports.ubuntu.com/ubuntu-ports/ trusty-proposed/main ppc64el Packages
        100 /var/lib/dpkg/status
     2.02~beta2-9ubuntu1.15 0
        500 http://ports.ubuntu.com/ubuntu-ports/ trusty-updates/main ppc64el Packages
     2.02~beta2-9ubuntu1.6 0
        500 http://ports.ubuntu.com/ubuntu-ports/ trusty-security/main ppc64el Packages
     2.02~beta2-9 0
        500 http://ports.ubuntu.com/ubuntu-ports/ trusty/main ppc64el Packages
ubuntu@P8lpar2:~$