[Bug 1988794] Re: Do-release upgrade is invalid

[Nick Rosbrook]

It looks like you are using an unknown mirror of the Ubuntu archive:

2022-09-06 09:53:37,734 DEBUG examining: 'deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic main restricted'
2022-09-06 09:53:37,735 DEBUG entry '# deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal main restricted # disabled on upgrade to focal' was disabled (unknown mirror)
2022-09-06 09:53:37,735 DEBUG examining: 'deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates main restricted'
2022-09-06 09:53:37,736 DEBUG entry '# deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates main restricted # disabled on upgrade to focal' was disabled (unknown mirror)
2022-09-06 09:53:37,736 DEBUG examining: 'deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic universe'
2022-09-06 09:53:37,737 DEBUG entry '# deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal universe # disabled on upgrade to focal' was disabled (unknown mirror)
2022-09-06 09:53:37,737 DEBUG examining: 'deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates universe'
2022-09-06 09:53:37,738 DEBUG entry '# deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates universe # disabled on upgrade to focal' was disabled (unknown mirror)
2022-09-06 09:53:37,738 DEBUG examining: 'deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic multiverse'
2022-09-06 09:53:37,739 DEBUG entry '# deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal multiverse # disabled on upgrade to focal' was disabled (unknown mirror)
2022-09-06 09:53:37,739 DEBUG examining: 'deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates multiverse'
2022-09-06 09:53:37,740 DEBUG entry '# deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates multiverse # disabled on upgrade to focal' was disabled (unknown mirror)
2022-09-06 09:53:37,740 DEBUG examining: 'deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse'
2022-09-06 09:53:37,741 DEBUG entry '# deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse # disabled on upgrade to focal' was disabled (unknown mirror)
2022-09-06 09:53:37,741 DEBUG examining: 'deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security main restricted'
2022-09-06 09:53:37,741 DEBUG entry '# deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security main restricted # disabled on upgrade to focal' was disabled (unknown mirror)
2022-09-06 09:53:37,741 DEBUG examining: 'deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security universe'
2022-09-06 09:53:37,742 DEBUG entry '# deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security universe # disabled on upgrade to focal' was disabled (unknown mirror)
2022-09-06 09:53:37,742 DEBUG examining: 'deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security multiverse'
2022-09-06 09:53:37,743 DEBUG entry '# deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security multiverse # disabled on upgrade to focal' was disabled (unknown mirror)

Please choose a supported mirror of the Ubuntu archive, and then try the
upgrade again. You can find a list of supported mirrors here:
https://launchpad.net/ubuntu/+archivemirrors.

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1988794

Title:
  Do-release upgrade is invalid

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

Bug description:
  When I upgraded from 16.04 to 20.04, I ran sudo do-release upgrade,
  kept prompting to report some bugs,and then quit.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.45
  ProcVersionSignature: Ubuntu 4.15.0-192.203-generic 4.15.18
  Uname: Linux 4.15.0-192-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.28
  Architecture: amd64
  CrashDB: ubuntu
  Date: Tue Sep  6 09:53:43 2022
  InstallationDate: Installed on 2022-09-05 (0 days ago)
  InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2022-09-06 (0 days ago)
  VarLogDistupgradeAptlog:
   Log time: 2022-09-06 09:53:11.782892
   Log time: 2022-09-06 09:53:24.667811
   Log time: 2022-09-06 09:53:42.828563
   Log time: 2022-09-06 09:53:45.683814
  mtime.conffile..etc.update-manager.release-upgrades: 2022-09-06T09:38:44.077573

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