I am running Xubuntu-12.04 LTS with all current updates. In Update Manager, I have: "Notify me of a new Ubuntu version" set to "For long-term support versions". But it doesn't offer the recently released 14.04 LTS. Shouldn't it? I have read that LTS to LTS upgrades are definitely supported, even if there are other releases in between.
Someone asked the same thing
over here and was told to run update-manager -d, but isn't that for "development releases"?