[Bug 1611430] Re: Cannot calculate upgrade from 14.04 to 16.04

[Arthur Azevedo de Amorim]

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

Thanks for your reply. I understand that I need to disable some PPA, but
it seems that oibaf doesn't do the trick. When I run 'sudo ppa-purge
oibaf', I get the following output:

Updating packages lists
W: There is no public key available for the following key IDs:
1397BC53640DB551
PPA to be removed: oibaf ppa
Warning:  Could not find package list for PPA: oibaf ppa

Is there any other PPA that I should try to disable?

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to ubuntu-release-upgrader in
Ubuntu.
https://bugs.launchpad.net/bugs/1611430

Title:
  Cannot calculate upgrade from 14.04 to 16.04

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

Bug description:
  When I try to upgrade from 14.04 to 16.04, I get an error message
  saying that it "cannot calculate the upgrade". My situation is similar
  to the one reported at http://askubuntu.com/questions/804875/could-
  not-calculate-upgrade-14-04-16-04: inspecting the log, I find that
  about 800 packages are marked as "broken" on my system. Given that
  many of them seem to be quite fundamental, I feel uneasy about simply
  deleting everything and trying to reinstall it.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.8
  ProcVersionSignature: Ubuntu 3.13.0-92.139-generic 3.13.11-ckt39
  Uname: Linux 3.13.0-92-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.21
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Tue Aug  9 11:33:42 2016
  DistributionChannelDescriptor:
   # This is a distribution channel descriptor
   # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
   canonical-oem-somerville-precise-amd64-20120703-2
  InstallationDate: Installed on 2013-03-23 (1235 days ago)
  InstallationMedia: Ubuntu 12.04 "Precise" - Build amd64 LIVE Binary 20120703-15:08
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2016-08-09 (0 days ago)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1611430/+subscriptions