my update manager is not showing the update to 16.04, but if I use the terminal sudo do-release-upgrade -d I'm asked to upgrade. I'm using 14.04. Is it just a matter of time or do we have to update manually?
Updates to the newest LTS are usually offered when it hits in this case 16.04.1. This is done because LTS releases often run in production enviroments and they want stable releases.
To have a check you can simply do from terminal
this will check if there is an actual release. If yes run the command
or respective if you did
sudo do-release-upgrade -d
-d will get you a development version which can be an option to get the upgrade going just make sure youre getting the 16.04 and nothing else from that branch.
According to the release notes:
14.04 LTS to LTS upgrades will be enabled with the 16.04.1 LTS point release, in approximately 3 months time.
This is for stability reasons, giving Canonical time to iron out bugs in the new release, and in the upgrade process.