===== Problem with Trackpoint on Lenovo Thinkpad T550 =====

I'm using an OpenSuse 13.2 x64

My Trackpoint is working bad: 
  left button : scroll up
  middle button : not detected
  right button : scroll down
<cli prompt='#'>
Virtual core pointer                      id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ SynPS/2 Synaptics TouchPad                id=10   [slave  pointer  (2)]
⎜   ↳ TPPS/2 IBM TrackPoint                     id=11   [slave  pointer  (2)]
⎣ Virtual core keyboard                     id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
    ↳ Power Button                              id=6    [slave  keyboard (3)]
    ↳ Video Bus                                 id=7    [slave  keyboard (3)]
    ↳ Integrated Camera                         id=8    [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard              id=9    [slave  keyboard (3)]
    ↳ ThinkPad Extra Buttons                    id=12   [slave  keyboard (3)]
</cli>

I create a module file:
<cli prompt='#'>
# cat /etc/modprobe.d/psmouse.conf 
options psmouse proto=imps
</cli>

Now use the psmouse built in and not a module, so the approach is slightly different.  You'll need to set it in /etc/default/grub and then update your grub config.
<cli prompt='#'>
# grep psmouse /etc/default/grub 
GRUB_CMDLINE_LINUX="rd.lvm.lv=vg00/swap rd.lvm.lv=vg00/root quiet psmouse.proto=imps"
</cli>

<cli prompt='#'>
# grub2-mkconfig -o /boot/grub2/grub.cfg
</cli>

After a reboot:
<cli prompt='#'>
# xinput list
Virtual core pointer                      id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ PS/2 Synaptics TouchPad                id=10   [slave  pointer  (2)]
⎣ Virtual core keyboard                     id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
    ↳ Power Button                              id=6    [slave  keyboard (3)]
    ↳ Video Bus                                 id=7    [slave  keyboard (3)]
    ↳ Integrated Camera                         id=8    [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard              id=9    [slave  keyboard (3)]
    ↳ ThinkPad Extra Buttons                    id=12   [slave  keyboard (3)]
</cli>

Trackpoint and touchpad are now working together