Disable phased updates in 20.04 LTS?

In Ubuntu 20.04 LTS the software updater says there are no available updates, but apt list --upgradable shows packages that can be upgraded. (I ran the command because I had installed something and then apt said I should.) Update-manager does not show all updates says updates can be phased and it's possible to disable them. Apparently, there are two preferences, Update-Manager::Never-Include-Phased-Updates "True"; and APT::Get::Never-Include-Phased-Updates "True";. Does that work for Ubuntu 20.04 and will it solve the problem?

$ apt list --upgradable
Listing... Done
update-notifier-common/focal-updates,focal-updates 3.192.30.6 all [upgradable from: 3.192.30.5]
update-notifier/focal-updates 3.192.30.6 amd64 [upgradable from: 3.192.30.5]

Solution 1:

Add this string:

Update-Manager::Always-Include-Phased-Updates;
APT::Get::Always-Include-Phased-Updates;

or

Update-Manager::Never-Include-Phased-Updates;

(A True/False boolean is not needed)

You should be able to add that line to any config file in /etc/apt/apt.conf.d/. Or create your own: /etc/apt/apt.conf.d/99-Phased-Updates

sources:

• https://askubuntu.com/a/1246984/34298
• https://discourse.ubuntu.com/t/phased-updates-in-apt-in-21-04/20345