[Bug 1903387] Re: Ubuntu failed to upgrade from Ubuntu 20.04 LTS to 20.10

[Brian Murray]

*** This bug is a duplicate of bug 1813354 ***
    https://bugs.launchpad.net/bugs/1813354

Thank you for taking the time to report this bug and helping to make
Ubuntu better. This particular bug has already been reported and is a
duplicate of bug 1813354, so it is being marked as such. Please look at
the other bug report to see if there is any missing information that you
can provide, or to see if there is a workaround for the bug.
Additionally, any further discussion regarding the bug should occur in
the other report.  Please continue to report any other bugs you may
find.

** This bug has been marked a duplicate of bug 1813354
   release-upgrader unable to deal with sources.list entries of "deb mirror://"

-- 
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/1903387

Title:
  Ubuntu failed to upgrade from Ubuntu 20.04 LTS to 20.10

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

Bug description:
  When I tried to upgrade from Ubuntu 20.04 LTS to 20.10 using Ubuntu
  update-manager an error happens:

  "Invalid package information

  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."

  
  More information:

  $ lsb_release -rd
  Description:	Ubuntu 20.04.1 LTS
  Release:	20.04

  $ apt-cache policy update-manager
  update-manager:
    Installed: 1:20.04.10.1
    Candidate: 1:20.04.10.1
    Version table:
   *** 1:20.04.10.1 500
          500 mirror://mirrors.ubuntu.com/mirrors.txt focal-updates/main amd64 Packages
          500 mirror://mirrors.ubuntu.com/mirrors.txt focal-updates/main i386 Packages
          100 /var/lib/dpkg/status
       1:20.04.9 500
          500 mirror://mirrors.ubuntu.com/mirrors.txt focal/main amd64 Packages
          500 mirror://mirrors.ubuntu.com/mirrors.txt focal/main i386 Packages

  $ apt-cache policy apt
  apt:
    Installed: 2.0.2ubuntu0.1
    Candidate: 2.0.2ubuntu0.1
    Version table:
   *** 2.0.2ubuntu0.1 500
          500 mirror://mirrors.ubuntu.com/mirrors.txt focal-updates/main amd64 Packages
          500 mirror://mirrors.ubuntu.com/mirrors.txt focal-security/main amd64 Packages
          100 /var/lib/dpkg/status
       2.0.2 500
          500 mirror://mirrors.ubuntu.com/mirrors.txt focal/main amd64 Packages

  $ apt-cache policy dpkg
  dpkg:
    Installed: 1.19.7ubuntu3
    Candidate: 1.19.7ubuntu3
    Version table:
   *** 1.19.7ubuntu3 500
          500 mirror://mirrors.ubuntu.com/mirrors.txt focal/main amd64 Packages
          100 /var/lib/dpkg/status

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubuntu-release-upgrader-core 1:20.04.28
  ProcVersionSignature: Ubuntu 5.4.0-52.57-generic 5.4.65
  Uname: Linux 5.4.0-52-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu27.11
  Architecture: amd64
  CasperMD5CheckResult: skip
  CrashDB: ubuntu
  Date: Sat Nov  7 09:08:59 2020
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to focal on 2020-11-07 (0 days ago)
  VarLogDistupgradeAptlog:
   Log time: 2020-11-07 09:08:18.698906
   Log time: 2020-11-07 09:08:25.854096
   Log time: 2020-11-07 09:08:56.423365
   Log time: 2020-11-07 09:09:00.628915
  VarLogDistupgradeTermlog:
   
  mtime.conffile..etc.update-manager.release-upgrades: 2020-11-07T09:03:09.002716

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1903387/+subscriptions