[Bug 999013] Re: Error: cannot upgrade to Quantal from Precise

[SlugiusRex]

I have experienced this as well, but I'm not sure that it should be
called a bug because the Update Manager detects the condition and
handles it with a dialog.

Using "sudo apt-get dist-upgrade" does the trick - but only partially
because then you get to a point where some of the packages cannot be
found or downloaded.   This seems to also prevent the Ubuntu Software
Center from loading properly.  (see
https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1003042)

W:Failed to fetch http://extras.ubuntu.com/ubuntu/dists/quantal/main/source/Sources 404 Not Found
, W:Failed to fetch http://extras.ubuntu.com/ubuntu/dists/quantal/main/binary-amd64/Packages 404 Not Found
, W:Failed to fetch http://extras.ubuntu.com/ubuntu/dists/quantal/main/binary-i386/Packages 404 Not Found
, E:Some index files failed to download. They have been ignored, or old ones used instead.

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https://bugs.launchpad.net/bugs/999013

Title:
  Error: cannot upgrade to Quantal from Precise

Status in “update-manager” package in Ubuntu:
  Confirmed

Bug description:
  Hello
  Testcase:
  -Start A Quantal session
  -Start update manager
  -Click on verify
  -It will return that not all the updates can be installed proposing a Partial upgrade.
  -Start the partial upgrade and it return that an 'upgrade from Quantal to Precise is not supported by this tool'
  Thanks
  Fabio
  **Workaround: upgrade from terminal**

  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: update-manager 1:0.156.14.1
  ProcVersionSignature: Ubuntu 3.4.0-1.3-generic 3.4.0-rc5
  Uname: Linux 3.4.0-1-generic x86_64
  ApportVersion: 2.0.1-0ubuntu7
  Architecture: amd64
  Date: Mon May 14 09:29:29 2012
  ExecutablePath: /usr/bin/update-manager
  GsettingsChanges:
   com.ubuntu.update-manager first-run false
   com.ubuntu.update-manager launch-time 1336980340
   com.ubuntu.update-manager show-details true
   com.ubuntu.update-manager window-height 527
   com.ubuntu.update-manager window-width 600
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
  InterpreterPath: /usr/bin/python2.7
  PackageArchitecture: all
  ProcEnviron:
   PATH=(custom, no user)
   LANG=it_IT.UTF-8
   SHELL=/bin/bash
  SourcePackage: update-manager
  UpgradeStatus: No upgrade log present (probably fresh install)

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