[Bug 1868294] Re: update-manager in eoan is refusing to install grub-efi-amd64-signed SRU, when upgrade is fine with it

[Steve Langasek]

Ok, running update-manager --debug shows me that:

INFO:root:holding back phased update grub-common (60 < 72)
INFO:root:holding back phased update grub-efi-amd64-bin (60 < 72)
INFO:root:holding back phased update grub-pc (60 < 72)
INFO:root:holding back phased update grub-pc-bin (60 < 72)
INFO:root:holding back phased update grub2-common (60 < 72)

So this is very confusing output in the case of a phased update
involving two different source packages.

** Changed in: update-manager (Ubuntu)
   Importance: Critical => Medium

** No longer affects: update-manager (Ubuntu Eoan)

** Summary changed:

- update-manager in eoan is refusing to install grub-efi-amd64-signed SRU, when upgrade is fine with it
+ update-manager output is inscrutable when phased-updates across 2 separate source packages prevent installation (grub2 vs grub2-signed)

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https://bugs.launchpad.net/bugs/1868294

Title:
  update-manager output is inscrutable when phased-updates across 2
  separate source packages prevent installation (grub2 vs grub2-signed)

Status in update-manager package in Ubuntu:
  New

Bug description:
  There is a grub2+grub2-signed SRU in eoan-updates that is failing to
  install here.  The publication all looks correct, and 'apt upgrade' or
  'apt dist-upgrade' show no problems, but update-manager repeatedly
  shows:

  "Package dependencies cannot be resolved
  This error could be caused by required additional software packages which are missing or not installable. Furthermore there could be a conflict between software packages which are not allowed to be installed at the same time.
  Transaction failed: Package dependencies cannot be resolved
   The following packages have unmet dependencies:

  grub-efi-amd64-signed:"

  Dependencies of the current eoan-updates version of the package are:

  Depends: grub-efi-amd64-bin (= 2.04-1ubuntu12.2), grub-efi-amd64 |
  grub-pc

  I have grub-pc and grub-efi-amd64-bin installed, and they should both
  be installable.

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