Comment 0 for bug 1245469

Upgrading from precise to trusty is returning as not being supported. The following is the console output when being attempted

ubuntu@ubuntu-virtual-machine:/var/log/dist-upgrade$ sudo do-release-upgrade -d
Checking for a new Ubuntu release
Get:1 Upgrade tool signature [198 B]
Get:2 Upgrade tool [1,119 kB]
Fetched 1,119 kB in 0s (0 B/s)
authenticate 'trusty.tar.gz' against 'trusty.tar.gz.gpg'
extracting 'trusty.tar.gz'

Reading cache

Checking package manager

Cannot upgrade

An upgrade from 'precise' to 'trusty' is not supported with this
tool.

Steps:
1. Install a precise desktop
2. Update to have the latest precise packages (sudo apt-get update && sudo apt-get -y dist-upgrade)
3. Reboot
4. Run do-release-upgrade -d and the above error message will appear

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: update-manager 1:0.156.14.11
ProcVersionSignature: Ubuntu 3.8.0-33.48~precise1-generic 3.8.13.11
Uname: Linux 3.8.0-33-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: amd64
Date: Mon Oct 28 12:39:34 2013
GsettingsChanges:
 com.ubuntu.update-manager first-run false
 com.ubuntu.update-manager launch-time 1382955723
InstallationMedia: Ubuntu 12.04.3 LTS "Precise Pangolin" - Release amd64 (20131016)
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_GB:en
 TERM=screen
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: update-manager
UpgradeStatus: Upgraded to precise on 2013-10-28 (0 days ago)
VarLogDistupgradeAptclonesystemstate.tar.gz: Error: [Errno 13] Permission denied: '/var/log/dist-upgrade/apt-clone_system_state.tar.gz'