Elemantary OS Touchpad is not working on Lenovo Ideapad 330s.
I tried libinput
and synaptics installation an configuration but it did not work.
Did you tried this?
sudo apt install xserver-xorg-input-synaptics
ref: https://askubuntu.com/questions/1031940/how-to-switch-from-libinput-to-synaptics-in-ubuntu-18-04
Also you could check the part where you should check if you have two touchpads in the following link:
Don't know if this will help, but have you tried to change the touchpad to basic in the bios. this worked for me on a different os.
I have an IdeaPad S145 and I think it's possible that the touchpad be the same. This post worked for me.
The workaround is to pass these parameters to the kernel.
i8042.nopnp=1 pci=nocrs
It's recommended to test before change definitely like this.
https://wiki.ubuntu.com/Kernel/KernelBootParameters
Good luck.
libinput
and synaptics installation"