[Bug 1799319] Re: Upgrade to 18.10 fails: Please install all available updates

[Guy Rouillier]

I just encountered this exact same scenario running Ubuntu Mate 19.04.
Software Updater believes all updates have been applied.  I get the pop-
up saying 19.10 is available, I click the Upgrade button, and the dialog
disappears and nothing happens.  Again, I drop to a command prompt:

root at ubuntu64:~# do-release-upgrade 
Checking for a new Ubuntu release
Please install all available updates for your release before upgrading.

root at ubuntu64:~# apt-get upgrade (following update)
The following packages were automatically installed and are no longer required:
  liblldb-8 llvm-8 llvm-8-dev llvm-8-runtime
Use 'apt autoremove' to remove them.
The following packages have been kept back:
  lldb
The following packages will be upgraded:
  gnome-shell gnome-shell-common

root at ubuntu64:~# do-release-upgrade 
Checking for a new Ubuntu release
Please install all available updates for your release before upgrading.

root at ubuntu64:~# apt-get purge lldb
Removing lldb (1:7.0-43ubuntu1) ...

And now  do-release-upgrade is proceeding.

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: Expired => Confirmed

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https://bugs.launchpad.net/bugs/1799319

Title:
  Upgrade to 18.10 fails: Please install all available updates

Status in ubuntu-release-upgrader package in Ubuntu:
  Confirmed

Bug description:
  I just tried to upgrade an x64 VM from 18.04 Mate to 18.10, and it
  failed. Using the Software Updater from the menu, it tells me

  "The software on this computer is up to date. However, Ubuntu 18.10 is
  now available (you have 18.04)."

  When I click the Upgrade... button, the dialog disappears and nothing
  happens.

  If I run do-release-upgrade from a terminal, it tells me

  "root at ubuntu64:~# do-release-upgrade
  Checking for a new Ubuntu release
  Please install all available updates for your release before upgrading."

  I have dual boot on this computer, and also have Ubuntu Mate 18.04
  running as a bootable OS. I just tried to upgrade that installation,
  and it fails in exactly the same way. I only recently installed that
  instance, so it's a very simple installation at this point (unlike the
  VM which I've used for several years and installed numerous packages,
  including PPA.) So there appears to be a general problem in this
  upgrade path.

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