We first posted a blog back in December about our work on the multi-monitor experience for Ubuntu. Back then we published the first revision of the Multiple Monitors UX Specification, and got some great feedback. We have taken comments, corrections and suggestions on board, and have come up with an updated multi-monitor specification. The specification can be found here:
 
 

There are several improvements to the specification (including more elegant discoverability of the Greeter login across displays, improved placement of windows upon removal of a display and a more feasible solution for providing missing resolutions in the Display Preferences panel).
The document has also been restructured in places, with new and extended sections, specifying in further detail how elements such as the Guest Session, Launcher, Spread and mouse cursor should work in a multi-monitor setup.

We have also created a prototype to explore how the Greeter works across multiple displays.

Multi-Monitor Greeter Prototype

Multi-Monitor Greeter Prototype

You can check out the prototype by downloading it from here: http://ubuntuone.com/6MHk2xkW5L3Bl9pGsj10z4

Unzip the package and double-click the executable in the folder. You will need more than one display to check this prototype out. As you move your cursor across displays, the Greeter will follow the cursor, allowing you to easily log in on any display. The Greeter itself is not interactive, we are just exploring how it moves between displays. There are also a few keyboard controls to try out:
 

Press Escape to exit the prototype.

Press Space to check out the prototype against a number of different desktop backgrounds (will cycle through the images in /usr/share/backgrounds)

Hold down Alt to show numbers on each display. Still holding down Alt, you can then tap a number to move the Greeter across to that numbered display, allowing you to change the display you log in with, without using the mouse. In the final implementation, the Super key will be used rather than the Alt key, but I can’t bind to that keyboard shortcut in my prototype.

Please let us know your thoughts on the updated specification and the new Greeter prototype.