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.
M. Becker, J. Mueller, A. Hotho, and G. Stumme. 1st International Workshop on Pervasive Urban Crowdsensing Architecture and Applications, PUCAA 2013, Zurich, Switzerland -- September 9, 2013. Proceedings, page New York, NY, USA. ACM, (2013)Accepted for publication.
M. Rosen-Zvi, T. Griffiths, M. Steyvers, and P. Smyth. Proceedings of the Twentieth Conference on Uncertainty in Artificial Intelligence (UAI), San Francisco, CA, Morgan Kaufmann, (2004)
H. Kuhn, and A. Tucker. Proceedings of the Second Berkeley Symposium on Mathematical Statistics and Probability, 1950, page 481--492. Berkeley and Los Angeles, University of California Press, (1951)