禁用触摸板后，我在“鼠标和触摸板”下找不到切换按钮。我找到的最合适的答案是 knocte 的答案问题。
我的机器上的触摸板 ID 是 13 而不是 7，因此我将“print $7”替换为“print $13”。但是当我这样做时，终端向我显示以下内容：“用法：BLABLABLA”，这表明命令用法错误。如果我只是复制答案，那么它会显示：“找不到设备从属”。
我输入的命令如下：
xinput set-prop `xinput --list | awk '/TouchPad.*pointer/ {print $13}' | sed 's/id=\(.*\)/\1/'` "Device Enabled" 1
我如何再次启用我的触摸板？
************第二次编辑********************
frank@frank-Inspiron-7447:~$ xinput set-prop 13 "Device Enabled" 1
frank@frank-Inspiron-7447:~$ xinput list
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ USB OPTICAL MOUSE id=16 [slave pointer (2)]
⎜ ↳ SynPS/2 Synaptics TouchPad id=13 [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)]
↳ Sleep Button id=10 [slave keyboard (3)]
↳ Integrated_Webcam_HD id=11 [slave keyboard (3)]
↳ AT Translated Set 2 keyboard id=12 [slave keyboard (3)]
↳ Dell WMI hotkeys id=14 [slave keyboard (3)]
↳ DELL Wireless hotkeys id=15 [slave keyboard (3)]
frank@frank-Inspiron-7447:~$ xinput -list-props 13
Device 'SynPS/2 Synaptics TouchPad':
Device Enabled (139): 0
Coordinate Transformation Matrix (141): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
Device Accel Profile (265): 1
Device Accel Constant Deceleration (266): 2.500000
Device Accel Adaptive Deceleration (267): 1.000000
Device Accel Velocity Scaling (268): 12.500000
Synaptics Edges (269): 1666, 5360, 1496, 4476
Synaptics Finger (270): 25, 30, 0
Synaptics Tap Time (271): 180
Synaptics Tap Move (272): 242
Synaptics Tap Durations (273): 180, 100, 100
Synaptics ClickPad (274): 1
Synaptics Middle Button Timeout (275): 0
Synaptics Two-Finger Pressure (276): 282
Synaptics Two-Finger Width (277): 7
Synaptics Scrolling Distance (278): 110, 110
Synaptics Edge Scrolling (279): 0, 0, 0
Synaptics Two-Finger Scrolling (280): 1, 1
Synaptics Move Speed (281): 1.000000, 1.750000, 0.036252, 0.000000
Synaptics Off (282): 2
Synaptics Locked Drags (283): 0
Synaptics Locked Drags Timeout (284): 5000
Synaptics Tap Action (285): 2, 3, 0, 0, 1, 3, 0
Synaptics Click Action (286): 1, 3, 0
Synaptics Circular Scrolling (287): 0
Synaptics Circular Scrolling Distance (288): 0.100000
Synaptics Circular Scrolling Trigger (289): 0
Synaptics Circular Pad (290): 0
Synaptics Palm Detection (291): 0
Synaptics Palm Dimensions (292): 10, 200
Synaptics Coasting Speed (293): 20.000000, 50.000000
Synaptics Pressure Motion (294): 30, 160
Synaptics Pressure Motion Factor (295): 1.000000, 1.000000
Synaptics Resolution Detect (296): 1
Synaptics Grab Event Device (297): 0
Synaptics Gestures (298): 1
Synaptics Capabilities (299): 1, 0, 0, 1, 1, 1, 1
Synaptics Pad Resolution (300): 60, 41
Synaptics Area (301): 0, 0, 0, 0
Synaptics Soft Button Areas (302): 3513, 0, 4094, 0, 0, 0, 0, 0
Synaptics Noise Cancellation (303): 27, 27
Device Product ID (259): 2, 7
Device Node (260): "/dev/input/event7"
frank@frank-Inspiron-7447:~$