如何設置觸摸板多指點擊功能？

This can be done using synclient.

To do this per-session (and to test that it's working correctly on your system), type into a terminal the following commands:

synclient "TapButton2"=2
synclient "TapButton3"=3

The option TapButtonx means "A tap with x fingers, not in a corner", while the numbers 1, 2 and 3 after correspond to left, middle and right click respectively.

To make these changes permanent, navigate to /usr/share/X11/xorg.conf.d. ls to find the file with "synaptics.conf" in the name (in my case, 50-synaptics.conf). Then, sudo gedit 50-synaptics.conf, and add the following lines into the end of the first InputClass section:

Option "TapButton2" "2"
Option "TapButton3" "3"

Then restart your machine, and you should be good to go.

If editing the 50-synaptics.conf file doesn't work, do the following: open dconf-editor and navigate to org/gnome/settings-daemon/plugins/mouse. Uncheck the box marked "active" and restart again. This will allow the synaptics settings to take precedence.

Here is what we need to do:

1. First we gather the ID for the trackpad/mouse pad.

   $ xinput --list  
   Virtual core pointer                        id=2    [master pointer  (3)]  
   ⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]  
   ⎜   ↳ PS/2 Generic Mouse                        id=10   [slave  pointer  (2)]    
   **⎜   ↳ SynPS/2 Synaptics TouchPad                  id=11   [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)]    
   ↳ Sleep Button                              id=8    [slave  keyboard (3)]    
   ↳ AT Translated Set 2 keyboard              id=9    [slave  keyboard (3)]    
   ↳ HP WMI hotkeys                            id=12   [slave  keyboard (3)]    
   

2. Now the highlighted one is our device with ID in my case 11

3. List out the properties and hence configuring the one against the ID

   $ xinput --list-props 11  
   Device 'SynPS/2 Synaptics TouchPad':  
   Device Enabled (132):   1  
   Coordinate Transformation Matrix (134): 1.000000, 0.000000, 0.000000, 0.000000,   1.000000, 0.000000, 0.000000, 0.000000, 1.000000  
   Device Accel Profile (253): 1  
   Device Accel Constant Deceleration (254):   2.500000  
   Device Accel Adaptive Deceleration (255):   1.000000  
   Device Accel Velocity Scaling (256):    12.500000  
   Synaptics Edges (276):  1769, 5431, 1653, 4671  
   Synaptics Finger (277): 25, 30, 256  
   Synaptics Tap Time (278):   180  
   Synaptics Tap Move (279):   242  
   Synaptics Tap Durations (280):  180, 180, 100  
   Synaptics ClickPad (281):   0  
   Synaptics Tap FastTap (282):    0  
   Synaptics Middle Button Timeout (283):  75  
   Synaptics Two-Finger Pressure (284):    282  
   Synaptics Two-Finger Width (285):   7  
   Synaptics Scrolling Distance (286): 110, 110  
   Synaptics Edge Scrolling (287): 1, 0, 0  
   Synaptics Two-Finger Scrolling (288):   0, 0  
   Synaptics Move Speed (289): 1.000000, 1.750000, 0.036265, 40.000000  
   Synaptics Edge Motion Pressure (290):   30, 160  
   Synaptics Edge Motion Speed (291):  1, 441  
   Synaptics Edge Motion Always (292): 0  
   Synaptics Off (293):    0  
   Synaptics Locked Drags (294):   0  
   Synaptics Locked Drags Timeout (295):   5000  
   Synaptics Tap Action (296): 2, 3, 0, 0, 1, 3, 0  
   Synaptics Click Action (297):   1, 1, 0  
   Synaptics Circular Scrolling (298): 0  
   Synaptics Circular Scrolling Distance (299):    0.100000  
   Synaptics Circular Scrolling Trigger (300): 0  
   Synaptics Circular Pad (301):   0  
   Synaptics Palm Detection (302): 0  
   Synaptics Palm Dimensions (303):    10, 200  
   Synaptics Coasting Speed (304): 20.000000, 50.000000  
   Synaptics Pressure Motion (305):        ... of unknown type CARDINAL  
   
   Synaptics Pressure Motion Factor (306): 1.000000, 1.000000  
   Synaptics Resolution Detect (307):  1  
   Synaptics Grab Event Device (308):  1  
   Synaptics Gestures (309):   1  
   Synaptics Capabilities (310):   1, 0, 1, 1, 1, 1, 1  
   Synaptics Pad Resolution (311): 85, 45  
   Synaptics Area (312):   0, 0, 0, 0  
   Synaptics Noise Cancellation (313): 8, 8  
   Device Product ID (249):    2, 7  
   Device Node (250):  "/dev/input/event8"  
   

4. Now find the point, in this case its 285, 288. Using the command you may configure the same on your touch pad.

   $xinput set-int-prop <properties>  
   

5. Hope this helps