Ubuntu 12.04 LTS (Precise Pangolin) is Canonical's sixteenth release of Ubuntu and its fourth Long Term Support (LTS) release, made available on schedule on 26 April 2012.[139][140] It is named after the pangolin anteater.[141] Previous LTS releases have been supported for three years for the desktop version and five years for the server version; this release will be supported for five years for both versions.[142][143]
Changes in this release include a much faster startup time for the Ubuntu Software Center and refinements to Unity. This release also replaced the Banshee media player with Rhythmbox as the default media player and dropped the Tomboy note-taking application and the supporting Mono framework as well.[144][145] Also, the window dodge feature has been removed from the Unity launcher starting with Ubuntu 12.04.[146]
Ubuntu 12.04 incorporated a new head-up display (HUD) feature that allows hotkey searching for application menu items from the keyboard, without needing the mouse. Shuttleworth said that the HUD "will ultimately replace menus in Unity applications" but for Ubuntu 12.04 at least the menus will remain.[147]