Thinkpad x240 - trackpointer configuration

[52ROSt]

kubuntu 14.04 LTS

I want to use the trackpointer, not the trackpad.

With System & Settings I could configure that the tyrackpad is switched off when I use an external mouse. However, there is nothing given to configure the trackpointer.

Now I found this ppa

https://launchpad.net/~linrunner/+archive/ubuntu/thinkpad-extras

which has listed

[IMG]https://launchpad.net/@@/package-source[/IMG]                 configure-trackpoint                                               0.7-3~trusty

Are there problems know with this ppa? If yes, what kind of problems?

What kind of experience was made with configuring the track pointer of an Thinkpad x240?

Thanks in advance for your help!