[Bug 2051115] Re: ubuntu pro integration interferes with dist-upgrade prompting

[Nathan Teodosio]

In Focal virtual machine installed .20 from proposed, did

--->
ua detach --assume-yes
apt update
apt upgrade
apt install hello
update-manager
<---

and confirmed that update-manager just says "The software on this
computer is up to date. However, Ubuntu 22.04.3 LTS is now available
(you have 20.04)."


** Tags removed: verification-jammy-jammy verification-needed verification-needed-focal
** Tags added: verification-done verification-done-focal verification-done-jammy

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https://bugs.launchpad.net/bugs/2051115

Title:
  ubuntu pro integration interferes with dist-upgrade prompting

Status in update-manager package in Ubuntu:
  Fix Released
Status in update-manager source package in Xenial:
  Fix Committed
Status in update-manager source package in Bionic:
  Fix Committed
Status in update-manager source package in Focal:
  Fix Committed
Status in update-manager source package in Jammy:
  Fix Committed
Status in update-manager source package in Noble:
  Fix Released

Bug description:
  The listing of Ubuntu Pro packages has been introduced in recent
  versions of update-manager, but as an undesired consequence, in up to
  date machines unattached to Ubuntu Pro, update-manager stopped
  prompting to upgrade to a next supported release.

  Ubuntu Pro packages should be merely an addition to this program and
  not alter its main behavior.

  [Test plan]

  --->
  ua detach --assume-yes
  apt update
  apt upgrade
  apt install hello
  update-manager
  <---

  Instead of listing Ubuntu Pro packages (the hello one, for example,
  always has a ESM update) that would be installable if the user
  attached to Ubuntu Pro, the update-manager window should simply do as
  it did in older versions, namely, state that software is up to date,
  and, if a newer LTS is available, suggest to the user to update to it.

  [Where problems could occur]

  The Pro packages should still be listed as such (i.e. under their own
  section, "Ubuntu Pro security updates", in the package listing) in
  case there is at least one upgradable package (as of 'apt list
  --upgradable'), whether the machine is attached, in which case the
  Ubuntu Pro section is sensitive, or unattached to Ubuntu Pro, in which
  case it is insensitive.

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