[Bug 1682909]

[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.

** 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/1682909

Title:
  Cannot upgrade Xubuntu from 16.10 to 17.04

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

Bug description:
  Try to upgrade and get message (RUS):
  "Не удалось рассчитать обновление системы

  Обнаружена неразрешимая проблема при расчёте обновления.

   Это может быть вызвано тем, что:
   * Обновление до пре-релиза Ubuntu
   * Использование текущей пре-релиз версии Ubuntu
   * Неофициальное ПО, не предоставляемое Ubuntu

  Если ничего из перечисленного не подходит, сообщите об этой ошибке,
  выполнив команду «ubuntu-bug ubuntu-release-upgrader-core» в
  терминале."

  ProblemType: Bug
  DistroRelease: Ubuntu 16.10
  Package: ubuntu-release-upgrader-core 1:16.10.10
  ProcVersionSignature: Ubuntu 4.8.0-46.49-generic 4.8.17
  Uname: Linux 4.8.0-46-generic x86_64
  ApportVersion: 2.20.3-0ubuntu8.2
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: XFCE
  Date: Fri Apr 14 21:48:50 2017
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to yakkety on 2017-04-14 (0 days ago)
  VarLogDistupgradeTermlog:

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