[Bug 1385719] Re: No information provided about why upgrade cannot complete

[Brian Murray]

*** This bug is a duplicate of bug 1069133 ***
    https://bugs.launchpad.net/bugs/1069133

Reviewing the files from your upgrade attempt you seem to have enabled a
PPA that provides Xorg packages. This will prevent the upgrade as that
PPA contains different versions of packages essential to Ubuntu.  The
page, https://launchpad.net/~xorg-edgers/+archive/ppa, contains details
on to how to revert to the official Xorg packages for the xorg-edgers
PPA.  Instructions for reverting to official Xorg packages should be
similar for the PPA that you have enabled.

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => Invalid

** Tags added: ppa xorg-edgers-ppa

** This bug has been marked a duplicate of bug 1069133
   Get upgrade error 12.04 - 12.10 "Could not determine upgrade" - xorg from ppa

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https://bugs.launchpad.net/bugs/1385719

Title:
  No information provided about why upgrade cannot complete

Status in “ubuntu-release-upgrader” package in Ubuntu:
  Invalid

Bug description:
  When I run Software Updater to upgrade from 14.04 to 14.10, I get an
  error message:

  "Could not determine the upgrade

  An unresolvable problem occurred while calculating the upgrade.

   This can be caused by:
   * Upgrading to a pre-release version of Ubuntu
   * Running the current pre-release version of Ubuntu
   * Unofficial software packages not provided by Ubuntu

  If none of this applies, then please report this bug using the command
  'ubuntu-bug ubuntu-release-upgrader-core' in a terminal."

  Okay, fair enough, I've installed several packages from PPAs that
  could potentially cause a conflict.  My problem is, this error message
  gives no useful information to target the problem.  The "Terminal"
  arrow in the Distribution Upgrade window is greyed out, so I cannot
  see the output to find out what packages might be conflicting.  I
  finally found the file /var/log/dist-upgrade/apt.log by looking at the
  lsof output, something no regular desktop user should be expected to
  do, which lead me to the problem.

  This error message needs to provide the user with some useful
  information to solve the problem, at the very *least* pointing them to
  the apt.log file.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.5
  ProcVersionSignature: Ubuntu 3.13.0-37.64-generic 3.13.11.7
  Uname: Linux 3.13.0-37-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.5
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Sat Oct 25 12:53:37 2014
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-08-03 (82 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2014-10-25 (0 days ago)
  VarLogDistupgradeTermlog:
   
  mtime.conffile..etc.update.manager.release.upgrades: 2014-08-03T23:18:10.888639

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