[Bug 1452968] Re: upgrade failed from 14.04.1 to 14.10

[Niels van Adrichem]

I experienced the same problem, I think it has been invoked by not first
updating + upgrading + dist-upgrading to the latest version of 14.04 (.3
at the time of writing) before running do-release-upgrade

Besides resetting the /etc/apt/sources.list file to trusty, as suggested
earlier, "pinning" to utopic sources as added by the failed do-release-
upgrade has to be removed from the /etc/apt/preferences file. As also
discussed in https://askubuntu.com/questions/615090/broken-upgrade-
from-14-04-to-14-10/665663#665663 , I succeeded to fix it for 3 machines
that all experienced this problem as follows:

sudo -s
cd /etc/apt

#Remove potential pinning preferences
mv preferences preferences_old

#Restore sources
mv sources.list sources.list.old
cp sources.list.save sources.list

#Clean apt cache
apt-get clean

#Possibly repeat this block until `lsb_release -a` shows 14.04.3 and no further update/dist-upgrades possible
apt-get update
apt-get upgrade
apt-get dist-upgrade

#Finally perform the release upgrade and reboot
do-release-upgrade

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

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https://bugs.launchpad.net/bugs/1452968

Title:
  upgrade failed from 14.04.1 to 14.10

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

Bug description:
  do-release-upgrade -d  fails

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:14.10.10
  ProcVersionSignature: Ubuntu 3.16.0-37.51-generic 3.16.7-ckt9
  Uname: Linux 3.16.0-37-generic x86_64
  ApportVersion: 2.14.7-0ubuntu8.4
  Architecture: amd64
  CrashDB: ubuntu
  Date: Fri May  8 05:37:30 2015
  InstallationDate: Installed on 2014-12-01 (157 days ago)
  InstallationMedia: Ubuntu-Server 12.04.4 LTS "Precise Pangolin" - Release amd64 (20140204)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2015-05-08 (0 days ago)

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