Comment 24 for bug 1414930

I'm hitting this on Ubuntu 14.10 as well. Out of the box, the left button generates button 4 events, the right button generates button 5 events, and the middle button generates nothing at all.

The situation improves a little bit by setting UpDownScrolling=0 ("synclient UpDownScrolling=0"), after which the left button generates a double left click and the right button generates a button 2 event. However, both buttons generates the press _and_release events right away - and no event is generated when the physical button is released.