This can be resolved by removing the xserver-xorg-input-synaptics package. I don't know if it was installed previous to installing Ubuntu 22.04, but both it and libinput were installed afterwards. Here is the page that gave me the tip.
https://gitlab.gnome.org/GNOME/gnome-flashback/-/issues/54 ** Bug watch added: gitlab.gnome.org/GNOME/gnome-flashback/-/issues #54 https://gitlab.gnome.org/GNOME/gnome-flashback/-/issues/54 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1970284 Title: Touch to click cannot be turned off.... To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1970284/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
