Relatively thorough and enjoyable course explains Ubuntu’s multi-touch developer Chase Douglas in a blog post the progress of the multi finger control in Ubuntu 11.04.
The multi-touch support will be directly implemented in X.org. The modified XInput protocol preferably operates under the name XInput 2.1. 11:04 Ubuntu turns it voluntarily as a test candidate for XInput 2.1 is available. Based on the practical experience of the users want the X.org developers XInput 2.1 Connecting to integrate into the main branch of X.org. Ubuntu’s own development Utouch future they will only work on the client side, rather than being the gestures “deep in the X server code” to generate. This conversion will also land in the first Ubuntu 11.10.
11:04 Ubuntu brings so previous version of XInput 2.1 with one that is loud Douglas also allows programs to be delivered with multi-touch support Qt. The implementation will pose challenges, and some special cases are probably only work in Ubuntu 11.10. So there are probably problems when several points on a touchpad touched and moved at the same time a second mouse pointer in another window. In the standard cases, but already well-functioning multi-touch, Douglas: “By the way, OS X atypical multi-touch input does not deal with in a rational nor predictable ways – as we saw at least reach their standard!”