How to make the trackpad work on an HP 15 Laptop With Ubuntu MATE Disco 19.04



Hello everyone! I have an HP 15 laptop from mid 2017 that's been happily running Ubuntu MATE since 17.04 with no configuration issues. When I installed Ubuntu MATE 19.04, the built-in trackpad didn't work.

The suggestions here (from 12.04)

got the thing working for a single session.

The suggestions here (from 14.04)

got it working permanently. Instead of


i did


as per the other thread.

I had tried a bunch of other things earlier, including adding xserver-xorg-input-synaptics so I don't know if that's key too!

I hope this helps! This is literally the only problem I've had with Ubuntu MATE in the past 4 years, and it only affects this one computer