[Bug 1354825] Re: release upgrades from an LTS with normal set should offer next LTS if next normal release is EoL

[Chris Perry]

I had the same problem, it was NOT related to the prompt value.  The
only way that I managed to fix it was to uninstall and purge update-
manager-core (which will remove update-notifier-common) and then
reinstall it.  After that upgrade proceeded normally.  (I did manually
delete the /var/lib/update-manager and /var/lib/update-notifier
directories as the purge command refused to).

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https://bugs.launchpad.net/bugs/1354825

Title:
  release upgrades from an LTS with normal set should offer next LTS if
  next normal release is EoL

Status in “ubuntu-release-upgrader” package in Ubuntu:
  Triaged
Status in “update-manager” package in Ubuntu:
  Triaged

Bug description:
  The update-manager tries to update from 12.04 to 12.10 but this seems
  to fail, because it's no longer supported, instead it should update to
  14.04.

  Steps to reproduce:
  1. Buy a dell laptop with ubuntu 12.04 pre-installed
  2. Run sudo do-release-upgrade or update manager gui

  Current result:
   sudo do-release-upgrade
  Checking for a new Ubuntu release
  Err Upgrade tool signature
    404  Not Found [IP: 91.189.92.201 80]
  Err Upgrade tool
    404  Not Found [IP: 91.189.92.201 80]
  Fetched 0 B in 0s (0 B/s)
  WARNING:root:file 'quantal.tar.gz.gpg' missing
  Failed to fetch
  Fetching the upgrade failed. There may be a network problem.

  Expected result:
  Ability to upgrade to either 12.10 -> 13.04 -> 14.04
  or upgrade directly from 12.04 -> 14.04 a direct upgrade path seems better.

  Additonal information of affected system:
  lsb_release -a
  No LSB modules are available.
  Distributor ID:	Ubuntu
  Description:	Ubuntu 12.04.5 LTS
  Release:	12.04
  Codename:	precise

  Also I am not the only one having this bug, see the following
  stackoverflow question: http://askubuntu.com/questions/504846
  /upgrading-from-12-04-3-lts-to-14-04-1-lts-failure this question
  wasn't posted by me, so this isn't only me.

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