After some additional troubleshooting, I've decided this is reported to the wrong package. Switching that.
The fix for me here was to set: $ gsettings set org.gnome.desktop.peripherals.touchpad click-method areas It appears that libinput defaulted my computer on reinstall of Ubuntu to the Apple/Mac style 1-2-3 finger alt-clicking. I think that is a great default *for Apple computers*, but a poor one for devices like this Dell where the traditional behavior is that of a 'clickpad', i.e., where you right+click by physically clicking on the bottom right of the touchpad. My suggested fix would be to detect the appropriate vendor and change click-method accordingly (Dell/Lenovo/Other->"areas"; Apple->"fingers"). Otherwise, we need to train users what to do, because this is *entirely unexpected* behavior from anyone who doesn't use a Mac computer. ** Also affects: libinput (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-input-synaptics in Ubuntu. https://bugs.launchpad.net/bugs/1767383 Title: touchpad right+click not working To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libinput/+bug/1767383/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp