I cannot upgrade Ubuntu Gnome 16.04.3 to 17.04. I have switched the setting in Software & Updates to Notify me of a new Ubuntu version: For any new version, I also tried editing
/etc/update-manager/release-upgrades and verified that
Prompt=normal was indeed set.
sudo apt-get update sudo apt-get upgrade sudo apt-get dist-upgrade
sudo do-release-upgrade -d
but it always returns:
sudo do-release-upgrade Checking for a new Ubuntu release Upgrades to the development release are only available from the latest supported release.
This is not a duplicate of the previous question; the path for Ubuntu GNOME is 16.04.3 to 17.04. There is no 16.10 release of Ubuntu GNOME, so I'm not skipping any release versions.