This works for me, however, instead of looking for the device `TPPS/2 Elan Trackpoint`, I had to use the id of `TrackPoint Keyboard 2`. The downside of this fix is that pasting with the middle button does not work anymore.
D. Smith, and G. Crane. Research and Advanced Technology for Digital Libraries, volume 2163 of Lecture Notes in Computer Science, Springer Berlin Heidelberg, (2001)