I want to use this

![](https://i.imgur.com/7ZkG63Q.jpg)

as this:

![](https://i.imgur.com/cEf9h7X.jpg)

Specifically, I'm trying to enable scroll wheel emulation using the TrackPoint when the middle button 2 of the *clickpad* is pressed.

I've examined the `xev` output when a TrackPoint is used for scrolling with dedicated buttons (button 4 is recognised as a scroll up operation and button 5 is recognised as a scroll down operation) but the behaviour is different when using the clickpad buttons (button 2 is recognised in isolation). It appears that a modified driver is needed in order to enable scrolling using the middle button of the clickpad.

Such a driver appears to be available here:

<https://aur.archlinux.org/packages/xf86-input-evdev-trackpoint/>

How could this driver be installed in Ubuntu?