[Bug 1799710] Re: 18.04->18.10: update-manager don't show upgrade page

[Brian Murray]

I also tested the upgrade process from Ubuntu 18.04 to Ubuntu 18.10 and
after installing the ubuntu-release-upgrader I was able to upgrade.

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https://bugs.launchpad.net/bugs/1799710

Title:
  18.04->18.10: update-manager don't show upgrade page

Status in ubuntu-release-upgrader package in Ubuntu:
  Fix Released
Status in update-manager package in Ubuntu:
  Invalid
Status in ubuntu-release-upgrader source package in Bionic:
  Fix Committed
Status in update-manager source package in Bionic:
  Invalid
Status in ubuntu-release-upgrader source package in Cosmic:
  Fix Committed
Status in update-manager source package in Cosmic:
  Invalid

Bug description:
  [Impact]
  do-release-upgrade checks to see if you have all available updates installed before allowing you to upgrade to the next release, however it doesn't take into account phased-updates subsequently it forces you to install updates which are under phasing (or have stopped phasing) before upgrading. This is not ideal as updates have stopped phasing for a reason and may end up negatively affecting your system before the release upgrade.

  [Test Case]
  0) Ensure that there are updates with a Phased-Update-Percentage of 0 use http://people.canonical.com/~ubuntu-archive/phased-updates.html as a guide.
  1) Install all available updates for your release using update-manager (which respects phasing)
  2) Run 'do-release-upgrade', '/usr/lib/ubuntu-release-upgrader/check-new-release-gtk', and 'update-manager -d'
  3) Observe a message re "Please install all available updates"

  with the version of ubuntu-release-upgrader from -proposed following
  the actions in step 2 should allow to upgrade to the next release of
  Ubuntu. N.B. If it doesn't make sure you disabled -proposed after
  installing ubuntu-release-upgrader-gtk!

  [Regression Potential]The patch is pretty straight forward and it'd be
  hard for it to cause a regression. One should confirm that there are
  phased updates available by running 'sudo apt-get dist-upgrade' and
  observing that there are packages available to install which update-
  manager won't.

  Hello,

  I want to upgrade to 18.10.
  So I start update-manager GUI then update some packets.
  At End it ask me if I want to upgrade. I answer Yes.
  But update-manager close. Nothing happens.

  I run it under terminal and get this message:
  Please install all available updates for your release before upgrading.

  Why GUI don't show this before close?

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