Simple Solution to switch Ubuntu notebook touchpad

This was accidentally discovered. Here we can temporarily solve this problem. It should be a small bug.

The touchpad of my notebook has a switch button, which can be used to set whether to use the touchpad. Sometimes the opposite may occur. When it is disabled, the Ubuntu prompt is enabled, when it is enabled, UBUNTU prompts that the touchpad is closed, which will make the touchpad unusable.

TIPS: on any page, right-click the touchpad and right-click it to bring up the shortcut menu. In this case, press the touchpad to open the key one time, move the mouse, and close the right-click menu, switch the touchpad again and you will find that the Ubuntu system prompts are consistent with the actual ones.