[Bug 1718172] [NEW] Upgrade to Ubuntu 17.04 crashes despite all tentatives

[Peer Davidsson]

Public bug reported:

When I tried to upgrade my Yakkety (16.10) to Zesty (17.04), the interface reports a bug in calculating changes because try to upgrade from developmental version of the system. I've done this from 12.04 to 13.04 and so on until the 16.10 So I don't really see the point of this note. Could it be that I use an unsupported packages in my system ? So far I found only openoffice packages to be unofficial in my PC.
Thanks

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: ubuntu-release-upgrader-core 1:16.10.10
ProcVersionSignature: Ubuntu 4.8.0-59.64-generic 4.8.17
Uname: Linux 4.8.0-59-generic x86_64
ApportVersion: 2.20.3-0ubuntu8.7
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Tue Sep 19 12:05:43 2017
EcryptfsInUse: Yes
InstallationDate: Installed on 2016-07-29 (416 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to yakkety on 2017-09-19 (0 days ago)
VarLogDistupgradeTermlog:

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


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

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https://bugs.launchpad.net/bugs/1718172

Title:
  Upgrade to Ubuntu 17.04 crashes despite all tentatives

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

Bug description:
  When I tried to upgrade my Yakkety (16.10) to Zesty (17.04), the interface reports a bug in calculating changes because try to upgrade from developmental version of the system. I've done this from 12.04 to 13.04 and so on until the 16.10 So I don't really see the point of this note. Could it be that I use an unsupported packages in my system ? So far I found only openoffice packages to be unofficial in my PC.
  Thanks

  ProblemType: Bug
  DistroRelease: Ubuntu 16.10
  Package: ubuntu-release-upgrader-core 1:16.10.10
  ProcVersionSignature: Ubuntu 4.8.0-59.64-generic 4.8.17
  Uname: Linux 4.8.0-59-generic x86_64
  ApportVersion: 2.20.3-0ubuntu8.7
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Tue Sep 19 12:05:43 2017
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2016-07-29 (416 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to yakkety on 2017-09-19 (0 days ago)
  VarLogDistupgradeTermlog:

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