Ubuntu uses the touch version as a built-in mouse setup guide

On your laptop, use the touch version as the built-in mouse. Note that the "Synaptics Touchpad" should be associated with the "Synaptic" (http://www.aliyun.com/zixun/aggregation/13835.html) >ubuntu Package Manager, The graphical user interface form of apt. In Breezy (5.10), the touchpad of the notebook computer should be available immediately. Open a terminal to view your/etc/x11/xorg.conf files with grep:

grep id/etc/x11/xorg.conf

If there is one line:

Identifier "Synaptics Touchpad"

Then you're using a Synaptics touchpad. In Dapper Flight 7 (6.06) The Synaptics Touchpad appears to be recognized as a camera-like device, so the wheel function of the touchpad may not be available. See "Edit your xorg.conf file to include Synaptics touch pad driver" to get wheel support. Qsynaptics (or Ksynaptics in KDE) is a graphical user interface program that allows you to set up your trackpad. To install the program, in the terminal, type:

sudo apt install qsynaptics

Or：

sudo apt install ksynaptics

You may need to run qsynaptics-r every time you start X. Please add to System > Preferences > Sessions > Launcher. In Intrepid (8.10), the system uses a different setting than xorg.conf to control the touchpad, please look directly at the settings for Intrepid (8.10) below.

Intrepid: Modify HAL to provide support for Synaptics Touchpad

The new X in Ubuntu 8.10 has been changed to modify the settings through the HAL, which are xorg.conf files. Some notebooks, such as Dell, do not function after installing Ubuntu 8.10. The following operation should be feasible, the content of FDI documents I was based on the contents of the Dell notebook changed, removed some parameter settings, did not test. If other brand notebooks use the following FDI documents, please use Dell directly, there should be no difference. In order to modify the touchpad configuration, you need to create a new and edited FDI file at HAL:

Gksudo GEDIT/ETC/HAL/FDI/POLICY/TOUCHPAD.FDI

Then put the following code completely in and save:

<?xml version= "1.0" encoding= "Iso-8859-1"?>
<deviceinfo version= "0.2" >
<device>
<match key= "Input.x11_driver" string= "Synaptics" >
<merge key= "Input.x11_options. Shmconfig "Type=" string >true</merge>
</match>
</device>
</deviceinfo>

And then reboot the HAL:

Sudo/etc/init.d/hal restart

Finally reboot the X (through simultaneous keystrokes ctrl+alt+backspace). To turn on and off the touchpad with a shortcut key, see the section below.