[Bug 1613183] Re: gui do-release-upgrade 14.04->16.04 stopped (because of no ubuntu-minimal mirror?)

[wdoekes]

** Attachment added: "VarLogDistupgradeMainlog.txt"
   https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1613183/+attachment/4721073/+files/VarLogDistupgradeMainlog.txt

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https://bugs.launchpad.net/bugs/1613183

Title:
  gui do-release-upgrade 14.04->16.04 stopped (because of no ubuntu-
  minimal mirror?)

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

Bug description:
  The GUI warned that ubuntu-minimal could not be located.

  The console version showed this:

  """
  After updating your package information, the essential package 
  'ubuntu-minimal' could not be located. This may be because you have 
  no official mirrors listed in your software sources, or because of 
  excessive load on the mirror you are using. See /etc/apt/sources.list 
  for the current list of configured software sources. 
  In the case of an overloaded mirror, you may want to try the upgrade 
  again later. 

  
  Restoring original system state

  Aborting
  """

  This could possibly be caused by me using a custom APT mirror (apt-
  cacher-ng).

  Replacing all of `MY_MIRROR` with `nl.archive.ubuntu.com` in
  sources.list seems to do the trick. The console do-release-upgrade now
  continues (and later aborts on disk space issues with /boot, but that
  was easily fixed as well).

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.8
  ProcVersionSignature: Ubuntu 3.13.0-88.135-generic 3.13.11-ckt39
  Uname: Linux 3.13.0-88-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.1-0ubuntu3.21
  Architecture: amd64
  CrashDB: ubuntu
  Date: Mon Aug 15 08:29:28 2016
  InstallationDate: Installed on 2014-04-29 (838 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2016-08-15 (0 days ago)
  VarLogDistupgradeAptlog:
   Log time: 2016-08-15 08:29:01.398250
   Log time: 2016-08-15 08:29:13.357910
   Log time: 2016-08-15 08:29:22.426505
   Log time: 2016-08-15 08:29:34.568601
  VarLogDistupgradeTermlog:

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