With Mint 17.1 I have found that the TrackPoint doesn't work completely out of the box - the mouse buttons for the TrackPoint act as scrollers rather than left and right click buttons.

From what I have been reading it would appear that the problem is due to Xorg using the synaptic driver that is not compatible with some of the latest hardware.

How to fix the TrackPoint:

Create the file /etc/modprobe.d/psmouse.conf with the following contents:

options psmouse proto=imps

Create the file /usr/share/X11/xorg.conf.d/90-evdev.conf with the following contents:

Section "InputClass"
    Identifier "Touchpad/TrackPoint"
    MatchProduct "PS/2 Synaptics TouchPad"
    MatchDriver "evdev"
    Option "EmulateWheel" "1"
    Option "EmulateWheelButton" "2"
    Option "Emulate3Buttons" "0"
    Option "XAxisMapping" "6 7"
    Option "YAxisMapping" "4 5"

Execute the following to ensure that initramfs loads the psmouse module correctly:

$ sudo update-initramfs -u