[Bug 1456608] [NEW] Upgrade to 15.04 crashes

[luigi1015]

Public bug reported:

Just as the summary suggests, I'm trying to upgrade to 15.04 and it
crashes. I've been upgrading this same system since at least 13.04 and
haven't had this problem until now. I'm not running a pre-release
version of Ubuntu. I think debug info is being added automatically.

Here's the text of the window that pops up:
Could not calculate 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.

ProblemType: Bug
DistroRelease: Ubuntu 14.10
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
NonfreeKernelModules: nvidia
ApportVersion: 2.14.7-0ubuntu8.4
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Tue May 19 07:17:23 2015
EcryptfsInUse: Yes
InstallationDate: Installed on 2013-01-05 (864 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to utopic on 2015-05-19 (0 days ago)
VarLogDistupgradeTermlog:

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dist-upgrade utopic

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https://bugs.launchpad.net/bugs/1456608

Title:
  Upgrade to 15.04 crashes

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

Bug description:
  Just as the summary suggests, I'm trying to upgrade to 15.04 and it
  crashes. I've been upgrading this same system since at least 13.04 and
  haven't had this problem until now. I'm not running a pre-release
  version of Ubuntu. I think debug info is being added automatically.

  Here's the text of the window that pops up:
  Could not calculate 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.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  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
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.7-0ubuntu8.4
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Tue May 19 07:17:23 2015
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2013-01-05 (864 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to utopic on 2015-05-19 (0 days ago)
  VarLogDistupgradeTermlog:

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