Internal keyboard and touchpad not detected anymore (only external work)

Hi, I installed OpenSuse Tumbleweed 6 months, initially the internal keyboard and touchpad worked out of the box, but recently I noticed that it’s not the case anymore. I always use an external keyboard and mouse so the change may have happened several month ago. My laptop is a Dell Inspiron 7405 2n1. What should I do? Thanks a lot

I’d start with Dell’s Knowledge Base Article…
https://www.dell.com/support/kbdoc/en-nz/000184025/dell-2-in-1-laptop-touchpad-or-keyboard-may-stop-responding-to-input