[Bug 2017305] [NEW] 23.04 Distribution Upgrade will not start - system says its up to date but command line tool says there are still updates

[Daniel Rice]

Public bug reported:

I'm just trying to upgrade from 22.10 to 23.04 and the upgrade will not
begin.  The GUI installer says everything is up to date.  When I push
`Upgrade...` nothing happens.  If I open up the command line and run
`sudo do-release-upgrade` all that is returned is a message to install
updates...

```
Checking for a new Ubuntu release
Please install all available updates for your release before upgrading.
```

There are no updates to install.  I've run `sudo apt update && sudo apt
upgrade` a dozen times.  There are no pending updates in Ubuntu
Software.

ProblemType: Bug
DistroRelease: Ubuntu 22.10
Package: ubuntu-release-upgrader-core 1:22.10.8
Uname: Linux 6.0.19-060019-generic x86_64
ApportVersion: 2.23.1-0ubuntu3.2
Architecture: amd64
CasperMD5CheckResult: unknown
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Fri Apr 21 11:21:52 2023
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
Symptom: release-upgrade
UpgradeStatus: Upgraded to kinetic on 2022-10-25 (178 days ago)
VarLogDistupgradeTermlog:

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dist-upgrade kinetic wayland-session

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https://bugs.launchpad.net/bugs/2017305

Title:
  23.04 Distribution Upgrade will not start - system says its up to date
  but command line tool says there are still updates

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

Bug description:
  I'm just trying to upgrade from 22.10 to 23.04 and the upgrade will
  not begin.  The GUI installer says everything is up to date.  When I
  push `Upgrade...` nothing happens.  If I open up the command line and
  run `sudo do-release-upgrade` all that is returned is a message to
  install updates...

  ```
  Checking for a new Ubuntu release
  Please install all available updates for your release before upgrading.
  ```

  There are no updates to install.  I've run `sudo apt update && sudo
  apt upgrade` a dozen times.  There are no pending updates in Ubuntu
  Software.

  ProblemType: Bug
  DistroRelease: Ubuntu 22.10
  Package: ubuntu-release-upgrader-core 1:22.10.8
  Uname: Linux 6.0.19-060019-generic x86_64
  ApportVersion: 2.23.1-0ubuntu3.2
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Apr 21 11:21:52 2023
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  Symptom: release-upgrade
  UpgradeStatus: Upgraded to kinetic on 2022-10-25 (178 days ago)
  VarLogDistupgradeTermlog:

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