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. However, you can add the lines e.g. in your .xsessionrc (depends on your distribution) so they are executed every time X starts.
To query the available options
xinput list-props "TPPS/2 IBM TrackPoint"
More information can be found in the man-pages for evdev
man evdev
To enable vertical scrolling
xinput set-prop "TPPS/2 IBM TrackPoint" "Evdev Wheel Emulation" 1 xinput set-prop "TPPS/2 IBM TrackPoint" "Evdev Wheel Emulation Button" 2 xinput set-prop "TPPS/2 IBM TrackPoint" "Evdev Wheel Emulation Timeout" 200
To enable horizontal scrolling in addition to vertical scrolling
xinput set-prop "TPPS/2 IBM TrackPoint" "Evdev Wheel Emulation Axes" 6 7 4 5
To enable middle button emulation (using left- and right-click simultaneously)
xinput set-prop "TPPS/2 IBM TrackPoint" "Evdev Middle Button Emulation" 1 xinput set-prop "TPPS/2 IBM TrackPoint" "Evdev Middle Button Timeout" 50
文章參考來源：http://www.thinkwiki.org/wiki/How_to_configure_the_TrackPoin
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