How to configure the TrackPoint

Below are several ways of configuring the kernel psmouse driver for controlling extended TrackPoint features.

Configuration using Gnome

If you are using GNOME, you might want to use configure-trackpoint as a graphical frontend.

Configuration using udev and HAL

Modern distributions like Ubuntu 8.10 and Fedora 10 use udev and HAL to configure the input devices. You should no longer make changes to xorg.conf as by default Xorg (through the evdev driver) will let the kernel now handle input devices.

But before you get started on this you should make sure you have all the updates applied from your distro vendor as both Ubuntu 8.10 and Fedora 10 require some additional fixes that you will need.

Vertical Scrolling

By default the middle mouse button is that, a middle mouse button, which in Linux is used for the Paste operation.

But you can configure it to act in the same way as in Windows, such that you can use it for vertical scrolling (keep the button pressed and move the TrackPoint up and down to scroll). To accomplish this create the file /etc/hal/fdi/policy/mouse-wheel.fdi as root with the following content:

<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.YAxisMapping" type="string">4 5</merge>
 <merge key="input.x11_options.Emulate3Buttons" type="string">true</merge>
 <merge key="input.x11_options.EmulateWheelTimeout" type="string">200</merge>
</match>

If you also want to have horizontal scrolling, simply add the following XAxisMapping option to the above

 <merge key="input.x11_options.XAxisMapping" type="string">6 7</merge>

After this reboot, or restart the hal service and Xorg. You can validate the settings with lshal.

In some models (eg: X301) you may have to use "PS/2 Generic Mouse" instead of "TPPS/2 IBM TrackPoint". Have a look to your input devices typing lshal|grep input.product.

Reactivate Scrolling after suspend/resume

Scrolling may be disabled after a resume from suspend.

You can manually reactivate the trackpoint by reloading the psmouse module as root:

# rmmod psmouse && modprobe psmouse

You can automatically force the pm-utils to reload this module. Create a file /etc/pm/config.d/01reload_mouse as root with the following content:

# reload psmouse to reactivate trackpoint scrolling
SUSPEND_MODULES="${SUSPEND_MODULES:+$SUSPEND_MODULES }psmouse"

Configuring other options (e.g. Press to select, Sensitivity and Speed)

Create a file /etc/udev/rules.d/10-trackpoint.rules and add a line to suit your needs

SUBSYSTEM=="serio", DRIVERS=="psmouse", ATTR{press_to_select}="1", ATTR{sensitivity}="122"

Testing udev with # udevadm test /sys/devices/platform/i8042/serio1 should apply the new changes. All of the settings listed below can be specified here as part of a comma separated list.

Configuration using xinput

If you want to modify changes on the fly, you can do so with xinput (part of the optional xorg-x11-apps rpm on Fedora). Note that these changes are not saved when the xserver is restarted.

To query the available options

xinput list-props "TPPS/2 IBM TrackPoint"

To enable vertical scrolling

xinput set-int-prop "TPPS/2 IBM TrackPoint" "Wheel Emulation" 8 1
xinput set-int-prop "TPPS/2 IBM TrackPoint" "Wheel Emulation Button" 8 2

TODO	some other examples

Configuration using sysfs

Another way to modify changes on the fly, is echoing values directly into special files in sysfs.

NOTE!

The examples shown below are valid for ThinkPads with both TrackPoint and Touchpad, in which case the sysfs path is /sys/devices/platform/i8042/serio1/serio2.

If however you have a ThinkPad without Touchpad, or with the Touchpad disabled in the BIOS, the sysfs path needs to be changed to /sys/devices/platform/i8042/serio1 instead (notice the missing serio2 at the end).

If you want to set the sysfs parameters at boot, you can use the sysfsutils and put the preferred value in /etc/sysfs.conf.

Press to Select

Press to Select allows you to tap the control stick which will simulate a left click. You can enable this feature by typing the following in to a terminal (you may need to be root):

# echo -n 1 > /sys/devices/platform/i8042/serio1/serio2/press_to_select

Press to Select should now be enabled. You can disable it in a similar manner:

# echo -n 0 > /sys/devices/platform/i8042/serio1/serio2/press_to_select

You can use this script to automate the operation

       #!/bin/bash
       if [ "$1" = "1" ]; then
               echo "Turning on tap on TrackPoint"
               echo -n 1 > /sys/devices/platform/i8042/serio1/serio2/press_to_select
               exit 0
       fi
       if [ "$1" = "0" ]; then
               echo "Turning off tap on TrackPoint"
               echo -n 0 > /sys/devices/platform/i8042/serio1/serio2/press_to_select
               exit 0
       fi
       echo -n "Tap status: "
       cat /sys/devices/platform/i8042/serio1/serio2/press_to_select

In Ubuntu 8.10 to make Press to Select a permanent change:

echo -n 1 | tee /sys/devices/platform/i8042/serio1/serio2/press_to_select

As root, append the above command above "exit 0" in /etc/gdm/Init/Default

Sensitivity & Speed

Adjusting the speed and sensitivity of the TrackPoint requires echoing a value between 0 and 255 into the appropriate file. For example, for a speed of 120 and a sensitivity of 250, type the following into a terminal:

# echo -n 120 > /sys/devices/platform/i8042/serio1/serio2/speed

# echo -n 250 > /sys/devices/platform/i8042/serio1/serio2/sensitivity

Feel free to experiment with your settings until you find a combination that is comfortable.

When you satisfy your setting, add the two lines into /etc/rc.d/rc.local in order to avoid restoring the default setting every time the system reboots. In Ubuntu 9.10, add the lines to /etc/rc.local to avoid this.

Vertical Scrolling

No sysfs entry exists for vertical scrolling in kernels after 2.6.11.

The feature was removed as it was not a hardware feature, but rather emulating a scroll action in software and as such did not belong in the kernel. Instead the scroll feature of the Xserver should be used, which can be activated with HAL or xinput as described above.

Configuration using the X server (old Xorg only)

NOTE!

This only applies to old distributions with Xorg versions that did not yet use evdev. For modern distributions use one of the other methods

The scroll setting has been removed from the trackpoint driver in kernel versions 2.6.11 and above. Scroll emulation should now be handled in the X server.

A nice side effect of that is, that middle button scrolling applies to any mouse and not just the TrackPoint interface, which can be a quite handy feature for desktop computers or people who prefer to use an external mouse, especially when scrolling through long lists or needing to use horizontal scrolling with a mouse which has only a vertical scroll wheel.

The necessary functionality, known as "EmulateWheelTimeout" allowing to use button 2 for a middle click, wasn't implemented in Xorg prior to 6.9/7.0. However, there was a patch included in most distributions packages of Xorg, which was announced here. You can find an updated version of the package in the experimental branch of Debian or try to build the mouse driver yourself with the information in the announcement. This has successfully been tried with FC3's 6.8.2 packages.

Once this functionality is in the X.org, add these lines to your TrackPoint configuration section in /etc/X11/xorg.conf:

       Option          "EmulateWheel"          "on"
       Option          "EmulateWheelButton"    "2"

It may also be necessary to add these lines:

       Option "YAxisMapping" "4 5"
       Option "XAxisMapping" "6 7"

which specify which buttons are mapped to motion in the vertical (Y) and horizontal (X) directions, respectively, in wheel emulation mode (see http://www.xfree86.org/current/mouse.4.html).

Hint:

Use the program "xev" to see, what mouse button identifiers are sent by your mouse/touchpad/trackpoint.
You might want to try: "xev | grep button"

Hint:

If it does not work see if evdev is installed and remove it. On gentoo do the following:

eix xf86-input-evdev
emerge -C xf86-input-evdev
and then remove the evdev flag in make.conf INPUT_DEVICES

So, a complete mouse section, that implements this nicely and works very well on my R51, even with a simultaneously connected USB mouse, looks like that (tried out today, 20th of September, 2006 on Dapper):

 Section "InputDevice"
       Identifier  "Configured Mouse"
       Driver      "mouse"
       Option      "CorePointer"
       Option      "Device"              "/dev/input/mice"
       Option      "Protocol"            "ExplorerPS/2"
       Option      "Emulate3Buttons"     "on"
       Option      "Emulate3TimeOut"     "50"
       Option      "EmulateWheel"        "on"
       Option      "EmulateWheelTimeOut" "200"
       Option      "EmulateWheelButton"  "2"
       Option      "YAxisMapping"        "4 5"
       Option      "XAxisMapping"        "6 7"
       Option      "ZAxisMapping"        "4 5"
 EndSection

The mappings for Y and Z are the same, since the "Z-Axis" refers to actual hardware scrolling wheels which usually scroll the screen along the Y-Axis. If there is no hardware scrolling wheel present, horizontal and vertical scrolling using the TrackPoint work fine without the Z-Axis line.

Now restart X and hold down button 2 and move the mouse to scroll, or just press and release button 2 for a middle click.

To make this work with the synaptics driver for the touchpad, you can add

       Option      "GuestMouseOff" "1"

to the synaptics device section. This will make the synaptics driver ignore the Trackpoint, so it will be handled by the mouse driver. This allowed me to disable the touchpad while making the TrackPoint work like it should.

NOTE!

With the above mouse section in my xorg.conf all this works like a charm:

• I can press the wheel on my external USB mouse and move the mouse up and down for scrolling
• or I can just use the wheel on the external mouse for scrolling
• or pressing the MMB button of the trackpoint and use the trackpoint for scrolling.
• Even horizontal scrolling works automagically in Konqueror, for Firefox/Opera see below.

Simultaneously I can use

• a press on the external mouse's wheel
• or the MMB of the trackpoint

for pasting the buffer. Lovely! :)

Hint:

If you don't use the middle-mouse-button for pasting and sometimes pasting things by mistake while scrolling (witch is really odd) simply set the "EmulateWheelTimeOut" to "1" as a (bloody) workaround. Middle click will only possible with pressing left and right button simultaneously!

Application specific tweaks

Configure Opera for using trackpoint horizontal scrolling

To fix horizontal scrolling in Opera, you need to edit the configfile standard_mouse.ini in e.g. /usr/share/opera/ini/ (Debian) or /opt/opera/share/opera/ini/ (Gentoo) and comment out the following lines

Button6                                                        = Back
Button7                                                        = Forward

so they look like that

;Button6                                                        = Back
;Button7                                                        = Forward

Remember, Button6 and Button7 do not so coincidental correspond with our X configuration we know from above:

Option "YAxisMapping" "6 7"

After this change you will be able to scroll vertically and horizontally with your middle button.

Firefox 3 tweaks

These settings make Firefox on Linux behave more like the Windows version. They were tested on an out of the box Fedora 10 system on a Thinkpad T61. Go into about:config, and set the following:

middlemouse.paste = false
middlemouse.contentLoadURL = false
general.autoScroll = true

Sysfs Options Reference

NOTE!

These options are current as of kernel version 2.6.29, 3 May 2009

Name	Type	Default	Notes
sensitivity	Integer	128	Sensitivity
speed	Integer	97	Cursor speed
inertia	Integer	6	Described as "negative inertia." It acts more like friction. High values cause the cursor to snap backward when the Trackpoint is released
reach	Integer	10	Backup for Z-axis press
draghys	Integer	255	Drag hysteresis (how hard it is to drag with Z-axis pressed)
mindrag	Integer	20	Minimum amount of force needed to trigger dragging
thresh	Integer	8	Minimum value for a Z-axis press
upthresh	Integer	255	Used to generate a 'click' on Z-axis
ztime	Integer	38	How sharp of a press
jenks	Integer	135	Minimum curvature for double click
press_to_select	Boolean	0	Press to select
skipback	Boolean	0	Supress movement after drag release
ext_dev	Boolean	0	Disable external device

Table info taken from here. The given link will always point to the current version of the driver. If the notes seem sparse, that's because the code is sparse. On the other hand, the Trackpoint Engineering Specification Version 4.0 contains more documentation information than anyone ever desired.