Use the command:

xinputlist 

View devices

Find the ID of the touchpad. For example, my id = 15

Then use the command:

xinput set-prop 15 “Device Enabled”0

The last “0” is to close the touchpad, and “1” is to open the touchpad

OpenSUSE test is available. I always use the external keyboard, but I can’t use the touch pad. Anyway, I don’t need it. It’s better to turn it off. Maybe I can save some power?Ha ha
ha