I.d.k. if it helps:
We had problems on many Systems (all of them used noninteractive
installation method)
We saw, that if we do debconf-show grub-pc it showed us a wrong device:
grub2/update_nvram: true
grub-pc/install_devices_failed: false
grub2/force_efi_extra_removable: false
* grub2/linux_cmdline: debian-installer=en_US
grub-pc/kopt_extracted: false
* grub2/linux_cmdline_default: quiet
grub-pc/install_devices_disks_changed:
grub2/kfreebsd_cmdline:
grub-pc/install_devices_failed_upgrade: true
grub2/kfreebsd_cmdline_default: quiet
grub-pc/mixed_legacy_and_grub2: true
grub-pc/hidden_timeout: false
* grub-pc/install_devices: /dev/vda
grub-pc/install_devices_empty: false
grub-pc/partition_description:
grub-pc/postrm_purge_boot_grub: false
grub-pc/disk_description:
grub-pc/timeout: 5
grub-pc/chainload_from_menu.lst: true
* should be /dev/xvda
if we start the installer manually (interactive) the output is like this
* grub-pc/install_devices_disks_changed: /dev/xvda
grub2/kfreebsd_cmdline:
grub-pc/mixed_legacy_and_grub2: true
grub-pc/kopt_extracted: false
grub-pc/hidden_timeout: false
grub-pc/partition_description:
grub2/kfreebsd_cmdline_default: quiet
grub-pc/timeout: 5
* grub2/linux_cmdline: debian-installer=en_US apparmor=1
security=apparmor
grub-pc/disk_description:
grub-pc/install_devices_empty: false
* grub-pc/install_devices: /dev/xvda
grub-pc/chainload_from_menu.lst: true
grub2/force_efi_extra_removable: false
grub-pc/postrm_purge_boot_grub: false
grub-pc/install_devices_failed_upgrade: true
* grub2/linux_cmdline_default: quiet
grub2/update_nvram: true
grub-pc/install_devices_failed: false
with the last output the system worked flawlessly
strangely we had no problems whatsoever with systems which where major
upgraded to buster.
All the Best
Dorian
