[Bug 1007314] Re: trying to upgrade from 11.10 to 12.04: The package 'postgresql-contrib-8.2' is marked for removal but it's in the removal blacklist

[Martin Pitt]

Please don't modify the blacklist. Instead, as you are using the
backports PPA, please update your apt sources to also use the backports
PPA for "precise" instead of "oneiric" before upgrading. I'm afraid we
can't quite support this kind of upgrade without a PPA, but if in doubt
I'd rather vote for preventing data loss.

Ideally the whole postgresql-*-*8.2 package set from Ubuntu 11.10 should
work on 12.04 just fine. However, that isn't the case because of the
libkrb53 -> libkrb5-3 transition, and we failed to provide a backwards
compatible libkrb53 transitional package.

So aside from letting upgraders with PPAs handle the situation manually,
I see two solutions:

 - Introduce a transitional libkrb53 into precise (it won't be needed
for quantal). This is a pin-pointed and very safe solution for stable.

 - Don't disable PPAs during upgrades, but instead rewrite their apt
lines for the release to be upgraded to. This is a bold solution which
will presumably also fix similar upgrade failures, but it might also
introduce new failures.

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https://bugs.launchpad.net/bugs/1007314

Title:
  trying to upgrade from 11.10 to 12.04: The package 'postgresql-
  contrib-8.2' is marked for removal but it's in the removal blacklist

Status in “update-manager” package in Ubuntu:
  Triaged
Status in “update-manager” source package in Precise:
  Triaged

Bug description:
  I was trying to upgrade from 11.10 to 12.04 using do-release-upgrade

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: update-manager (not installed)
  ProcVersionSignature: Ubuntu 3.0.0-20.34-generic-pae 3.0.30
  Uname: Linux 3.0.0-20-generic-pae i686
  ApportVersion: 1.23-0ubuntu4
  Architecture: i386
  Date: Fri Jun  1 11:42:29 2012
  InstallationMedia: Ubuntu-Server 10.04.1 LTS "Lucid Lynx" - Release i386 (20100816.2)
  ProcEnviron:
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: update-manager
  UpgradeStatus: Upgraded to oneiric on 2012-06-01 (0 days ago)

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