Lenovo Thinkpad T440 + ubuntu 19.04
I update my laptop from Ubuntu 18.04 to 19.04, When I turn on at that time touchpad was working fine but, When I slide down the screen (Basically after sleep mode) and open It again, Then touchpad was stopped working, Also little red Eraserhead (Red Joystick) is stopped working, (No cursor move when I move red joystick) after that I need to restart my PC, no other option.
A pointer is working fine if any external mouse is attached.