$sudo gedit /etc/X11/xorg.conf
将：
Section "InputDevice"
Identifier "Configured Mouse"
Driver "vmmouse"
Option "CorePointer"
Option "Device" "/dev/input/mice"
EndSection
改为：
Section "InputDevice"
Identifier "Configured Mouse"
Driver "vmmouse"
Option "Protocol" "ImPS/2"
Option "CorePointer"
Option "Device" "/dev/input/mice"
Option "ZAxisMapping" "4 5"
Option "Emulate3Buttons" "yes"
EndSection