如何在联想ThinkPad e531上使用Trackpoint但禁用触摸板

我有一台Lenovo ThinkPad e531笔记本电脑。该模型同时具有触摸板和跟踪点。我想使用Trackpoint，因为我以前的笔记本电脑已经习惯了Trackpoint，但是我也想禁用触摸板，以防止意外触摸它。

问题是，e531上没有专用的跟踪点按钮。

这是e530型号的图片：

您可以看到它在触摸板上方有一个单独的按钮，可以在使用轨迹点时使用它们。

这是我的模型（e531）的图片：

如您所见，没有按钮。只有触摸板。

I can disable the touchpad (in System Settings > Mouse & Touchpad) and use the trackpoint to move the mouse pointer around, but then there is no way to click. As you can probably imagine, this is not very useful.

What I'm thinking is there should be a way to disable the mouse motion feature of the touchpad but still keep it clickable so I can use it as the mouse buttons for the trackpont. My question is, how to do it.

I assume that it can be achieved with the xinput utility, but as I'm not very familiar with it, I don't know how. Anybody can help me here, or at least point me in the right direction?

This is the output of xinput on my machine:

~ > xinput
⎡ Virtual core pointer                      id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ SynPS/2 Synaptics TouchPad                id=12   [slave  pointer  (2)]
⎜   ↳ TPPS/2 IBM TrackPoint                     id=14   [slave  pointer  (2)]
⎜   ↳ Logitech Unifying Device. Wireless PID:1025   id=15   [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)]
    ↳ Video Bus                                 id=8    [slave  keyboard (3)]
    ↳ Power Button                              id=9    [slave  keyboard (3)]
    ↳ Integrated Camera                         id=10   [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard              id=11   [slave  keyboard (3)]
    ↳ ThinkPad Extra Buttons                    id=13   [slave  keyboard (3)]

This is the list of the TrackPoint (device 14) properties:

~ > xinput --list-props 14
Device 'TPPS/2 IBM TrackPoint':
        Device Enabled (133):   1
    Coordinate Transformation Matrix (135): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
    Device Accel Profile (256): 0
    Device Accel Constant Deceleration (257):   1.000000
    Device Accel Adaptive Deceleration (258):   1.000000
    Device Accel Velocity Scaling (259):    10.000000
    Device Product ID (250):    2, 10
    Device Node (251):  "/dev/input/event13"
    Evdev Axis Inversion (404): 0, 0
    Evdev Axes Swap (406):  0
    Axis Labels (407):  "Rel X" (143), "Rel Y" (144)
    Button Labels (408):    "Button Left" (136), "Button Middle" (137), "Button Right" (138), "Button Wheel Up" (139), "Button Wheel Down" (140), "Button Horiz Wheel Left" (141), "Button Horiz Wheel Right" (142)
    Evdev Middle Button Emulation (409):    0
    Evdev Middle Button Timeout (410):  50
    Evdev Third Button Emulation (411): 0
    Evdev Third Button Emulation Timeout (412): 1000
    Evdev Third Button Emulation Button (413):  3
    Evdev Third Button Emulation Threshold (414):   20
    Evdev Wheel Emulation (415):    1
    Evdev Wheel Emulation Axes (416):   6, 7, 4, 5
    Evdev Wheel Emulation Inertia (417):    10
    Evdev Wheel Emulation Timeout (418):    200
    Evdev Wheel Emulation Button (419): 2
    Evdev Drag Lock Buttons (420):  0

This is the list of the Touchpad (device 12) properties:

~ > xinput --list-props 12
Device 'SynPS/2 Synaptics TouchPad':
    Device Enabled (133):   1
    Coordinate Transformation Matrix (135): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
    Device Accel Profile (256): 1
    Device Accel Constant Deceleration (257):   2.500000
    Device Accel Adaptive Deceleration (258):   1.000000
    Device Accel Velocity Scaling (259):    12.500000
    Synaptics Edges (260):  1726, 4858, 1577, 3665
    Synaptics Finger (261): 25, 30, 256
    Synaptics Tap Time (262):   180
    Synaptics Tap Move (263):   192
    Synaptics Tap Durations (264):  180, 180, 100
    Synaptics ClickPad (265):   1
    Synaptics Tap FastTap (266):    0
    Synaptics Middle Button Timeout (267):  0
    Synaptics Two-Finger Pressure (268):    282
    Synaptics Two-Finger Width (269):   7
    Synaptics Scrolling Distance (270): 87, 87
    Synaptics Edge Scrolling (271): 0, 0, 0
    Synaptics Two-Finger Scrolling (272):   1, 0
    Synaptics Move Speed (273): 1.000000, 1.750000, 0.045725, 40.000000
    Synaptics Edge Motion Pressure (274):   30, 160
    Synaptics Edge Motion Speed (275):  1, 349
    Synaptics Edge Motion Always (276): 0
    Synaptics Off (277):    0
    Synaptics Locked Drags (278):   0
    Synaptics Locked Drags Timeout (279):   5000
    Synaptics Tap Action (280): 2, 3, 0, 0, 1, 3, 0
    Synaptics Click Action (281):   1, 3, 0
    Synaptics Circular Scrolling (282): 0
    Synaptics Circular Scrolling Distance (283):    0.100000
    Synaptics Circular Scrolling Trigger (284): 0
    Synaptics Circular Pad (285):   0
    Synaptics Palm Detection (286): 0
    Synaptics Palm Dimensions (287):    10, 200
    Synaptics Coasting Speed (288): 20.000000, 50.000000
    Synaptics Pressure Motion (289):    30, 160
    Synaptics Pressure Motion Factor (290): 1.000000, 1.000000
    Synaptics Resolution Detect (291):  1
    Synaptics Grab Event Device (292):  1
    Synaptics Gestures (293):   1
    Synaptics Capabilities (294):   1, 0, 0, 1, 1, 1, 1
    Synaptics Pad Resolution (295): 42, 42
    Synaptics Area (296):   0, 0, 0, 0
    Synaptics Soft Button Areas (297):  3292, 0, 3397, 0, 0, 0, 0, 0
    Synaptics Noise Cancellation (298): 8, 8
    Device Product ID (250):    2, 7
    Device Node (251):  "/dev/input/event6"