solved thanks to https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1893663
Touchpad works fine after applying the change explained there: this work https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1893663/comments/12
solved thanks to https:/ /bugs.launchpad .net/ubuntu/ +source/ linux/+ bug/1893663
Touchpad works fine after applying the change explained there: this work https:/ /bugs.launchpad .net/ubuntu/ +source/ linux/+ bug/1893663/ comments/ 12