Comment 0 for bug 2008280

Hello,

On a fairly standard installation of lunar (ie no ubuntu pro linked etc), the update-manager no longer appears able to install the updates which are listed in the ui when clicking install.

symptoms:
- launch update-manager 1:23.04.1
- note that updates are available
- note that the ui shows 'unknown download size' in the bottom-left (this should be specified)
- note that the terminal output shows "required_download could not be calculated: E:Can't find a source to download version 'PKGVERSION' of 'PKGNAME:amd64'"
- click 'install now' button to install the listed updates
- note that update-manager doesn't actually install the updates (starting the update fails), the ui jumps to the generic 'installing snap updates' and then shows 'your system is up to date'
- note that if you launch update-manager again all the (same) updates are showing again

severity:
- this is a little concerning as the user can no longer install updates using the update-manager ui and the obvious way for a user to install a fix of this issue is indeed by clicking install updates in the update-manager ui once this has been fixed - which in this case won't be possible. (sudo apt update/upgrade in the terminal do of course still work)
- whilst this issue has been around for at least 5 days there don't appear to be any other reports of this issue. It doesn't seem likely to be something specific to my system though.

investigation:
- installing the debs of update-manager 1:22.10.6 (the previous version) resolves this issue
- it would appear that revision 2959 ( https://bazaar.launchpad.net/~ubuntu-core-dev/update-manager/main/revision/2959 ) is the first revision to introduce this issue
- this seems related to Ubuntu Pro / Advantage

Thanks for your attention