[Bug 1787797] Re: Can't upgrade server from 16.04 to 18.04.01

[Fabio Marzocca]

I don't think it is a ppa related problem, as the upgrade procedure
disables all ppa links in sources.

Looking at the logs, I have found this line:

ERROR Dist-upgrade failed: 'E:Error, pkgProblemResolver::Resolve
generated breaks, this may be caused by held packages.'

As I am holding python-netcdf4 to v. 1.2.2, perhaps this is the problem.

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https://bugs.launchpad.net/bugs/1787797

Title:
  Can't upgrade server from 16.04 to 18.04.01

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

Bug description:
  
  ~# cat /etc/lsb-release 
  DISTRIB_ID=Ubuntu
  DISTRIB_RELEASE=16.04
  DISTRIB_CODENAME=xenial
  DISTRIB_DESCRIPTION="Ubuntu 16.04.5 LTS"

  Trying to upgrade from 16.04.05 server, by launching do-release-
  upgrade, the system was not able to continue and restored the old
  system.

  I have also run   ubuntu-bug ubuntu-release-upgrader-core and sent the
  report, which I am also attaching here.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.25
  ProcVersionSignature: Ubuntu 4.4.0-133.159-generic 4.4.134
  Uname: Linux 4.4.0-133-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  CrashDB: ubuntu
  Date: Sun Aug 19 10:22:58 2018
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2018-08-19 (0 days ago)

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