On a Lenovo laptop, I want to upgrade from Ubuntu 18.04 to Ubuntu 18.10 (budgie).
When I select upgrade on the update manager, the dialog box disappears and nothing happens. The upgrade doesn't start.
Note- I went through the same procedure this morning on my other laptop and Ubuntu successfully upgraded.
do-release-upgrade fails to upgrade and throws this error:
Please install all available updates for your release before upgrading.
What can I do to upgrade the system successfully?