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On most thinkpad, you need to modify /etc/X11/xorg.conf to enable scrolling with the Trackpoint.

Trackpoint on Lenny

In /etc/X11/xorg.conf, find the section named "Configured Mouse", then follow the instruction :

Section "InputDevice"
        Identifier      "Configured Mouse"
        Driver          "mouse"

        #add those three lines
        Option          "EmulateWheel"          "true"
        Option          "EmulateWheelTimeOut"   "200"
        Option          "EmulateWheelButton"    "2"
EndSection

Trackpoint on Etch

In /etc/X11/xorg.conf, find the section named "Configured Mouse", then follow the instruction :

Section "InputDevice"
        Identifier      "Configured Mouse"
        Driver          "mouse"
        Option          "CorePointer"
        Option          "Device"               "/dev/input/mice"
        Option          "Protocol"             "ImPS/2"

        #Comment this line out
        #Option          "Emulate3Buttons"      "true"

        #add those three lines
        Option          "EmulateWheel"          "true"
        Option          "EmulateWheelTimeOut"   "200"
        Option          "EmulateWheelButton"    "2"
EndSection

Trackpoint on Squeeze and later

Thanks to hal and Xorg integration... Create the file /etc/hal/fdi/policy/ibm_trackpoint.fdi containing:

<?xml version="1.0" encoding="UTF-8"?> <!-- -*- SGML -*- -->
<deviceinfo version="0.2">

<match key="info.product" string="TPPS/2 IBM TrackPoint">
 <merge key="input.x11_options.EmulateWheel" type="string">true</merge>
 <merge key="input.x11_options.EmulateWheelButton" type="string">2</merge>
 <merge key="input.x11_options.Emulate3Buttons" type="string">true</merge>
 <merge key="input.x11_options.EmulateWheelTimeout" type="string">200</merge>
</match>
</deviceinfo>

Device identification

Device is a "TPPS/2 IBM TrackPoint":

• dmidecode -t 21 reports

  Built-in Pointing Device
          Type: Track Point
          Interface: PS/2
          Buttons: 3

• /proc/bus/input/devices contains:

  I: Bus=0011 Vendor=0002 Product=000a Version=0000
  N: Name="TPPS/2 IBM TrackPoint"
  P: Phys=synaptics-pt/serio0/input0
  S: Sysfs=/class/input/input12
  U: Uniq=
  H: Handlers=mouse2 event12 
  B: EV=7
  B: KEY=70000 0 0 0 0 0 0 0 0
  B: REL=3

See Also

• How to configure the TrackPoint
  http://thinkwiki.org/wiki/How_to_configure_the_TrackPoint

• What’s so good about TrackPoint?
  http://blog.10ninox.com/2007/12/10/whats-so-good-about-trackpoint/