原来是这样的:   QUOTE: Section "InputDevice" Identifier "Synaptics" Driver "synaptics"

原来是这样的:
 

QUOTE:
Section "InputDevice"
Identifier "Synaptics"
Driver "synaptics"
Option "Device" "/dev/input/mice"
Option "Protocol" "auto-dev"
Option "Emulate3Buttons" "yes"
EndSection
Section "InputDevice"
Identifier "Synaptics"
Driver "synaptics"
Option "Device" "/dev/input/mice"
Option "Protocol" "auto-dev"
Option "Emulate3Buttons" "yes"
EndSection


添加两行参数
 

QUOTE:
Option "TapButton1" "1"
Option "TapButton2" "2"

Option "TapButton1" "1"
Option "TapButton2" "2"


改成这样就可以了。
 

QUOTE:
Section "InputDevice"
Identifier "Synaptics"
Driver "synaptics"
Option "Device" "/dev/input/mice"
Option "Protocol" "auto-dev"
Option "Emulate3Buttons" "yes"
Option "TapButton1" "1"
Option "TapButton2" "2"
EndSection