[Bug 1850966] Re: Stuck at "Refreshing software cache" after enabling repository not updated for Eoan

[Mirko Ducic]

Hi guys,
I manually fixed this issue with bad GUI representation of process execution.
You have to remove some old or not any more synchronized repositories.
In terminal, execute command: sudo apt update

This will tell you witch repos are bad, examples:
E: The repository 'http://ppa.launchpad.net/somerville-dla-team/ppa/ubuntu focal Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
---------------------------------------------------------------------------------------------------------
E: The repository 'http://oem.archive.canonical.com/updates bionic-oem Release' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: GPG error: http://dell.archive.canonical.com/updates bionic-dell-beaver-osp1-sansa Release: Detached signature file '/var/lib/apt/lists/partial/dell.archive.canonical.com_updates_dists_bionic-dell-beaver-osp1-sansa_Release.gpg' is in unsupported binary format
E: The repository 'http://dell.archive.canonical.com/updates bionic-dell-beaver-osp1-sansa Release' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: GPG error: http://dell.archive.canonical.com/updates bionic-dell-service Release: Detached signature file '/var/lib/apt/lists/partial/dell.archive.canonical.com_updates_dists_bionic-dell-service_Release.gpg' is in unsupported binary format
E: The repository 'http://dell.archive.canonical.com/updates bionic-dell-service Release' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

Go to Software & Updates, card Other software, find and remove these
repositories (you have option for this, remove all with E (error)).

That's it. Do not expect to stuck at "Refreshing software cache" any
more.

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Foundations Bugs, which is subscribed to software-properties in Ubuntu.
https://bugs.launchpad.net/bugs/1850966

Title:
  Stuck at "Refreshing software cache" after enabling repository not
  updated for Eoan

Status in software-properties package in Ubuntu:
  Confirmed

Bug description:
  Steps to reproduce:
  1. Open Software and Updates
  2. Go to "other software" and enable, for example, a repository disabled during upgrade to Eoan which is not updated for Eoan yet
  3. Press close and then reload on the dialog that opens.
  4. Refreshing software cache dialog is stuck

  After closing the dialogs by right clicking on the windows and the
  open apps bar, re opening Software and updates only shows a white
  square you can't interact with.

  Ubuntu 19.10

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