The login experience has been overhauled for Ubuntu 12.04 thanks to the introduction of LightDM as the default display manager and complete redesign of the UI – henceforth known as the Unity Greeter.
Resources:
- Documentation (Google Docs)
- Visual design (.tar.gz / 12.7 MB)
- Video mockup (x264 / 1.9 MB)
- Unity Greeter in Launchpad
- Multi-Monitor Greeter Prototype
The toolkit