[Bug 1454293] ProcEnviron.txt

[rew]

apport information

** Attachment added: "ProcEnviron.txt"
   https://bugs.launchpad.net/bugs/1454293/+attachment/4397151/+files/ProcEnviron.txt

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https://bugs.launchpad.net/bugs/1454293

Title:
  Upgrade doesn't work.

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

Bug description:
  The upgrader (do-release-upgrade) says it cannot do the upgrade, after
  "calculating upgrade".

  It tells me to file a bug, and the bug-reporter then hangs. I press
  control-C and somehow it continues. Then I get a "firefox" window that
  doesn't work.

  Anyway. The error message  ("cannot perform upgrade") is not helpful
  in helping me solve the problem.

  I had a PPA installed, I guessed that might be the problem, removed it
  from my sources.list. But the error persists.

  I can hack a kernel, I can write/maintain Linux packages. But if the
  error is of the form: "cannot do X" I can't start looking for the
  cause.

  A thread on askubuntu marked as "solved" suggested just changing the
  references to the old distro's name to the new distro's name in
  apt/sources.list . I did that, and now it's upgrading. If this works,
  why can't do-release-upgrade do what it is supposed to do?

    lsb_release -rd 
  already says: 
    Description:    Ubuntu 15.04  
    Release:        15.04
  but I'm upgrading from 14.10.
  --- 
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  CrashDB: ubuntu
  DistroRelease: Ubuntu 15.04
  InstallationDate: Installed on 2014-11-16 (178 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  Package: ubuntu-release-upgrader (not installed)
  ProcVersionSignature: Ubuntu 3.16.0-31.41-generic 3.16.7-ckt5
  Tags:  vivid dist-upgrade
  Uname: Linux 3.16.0-31-generic x86_64
  UpgradeStatus: Upgraded to vivid on 2015-05-12 (1 days ago)
  UserGroups:
   
  _MarkForUpload: True

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