Could you please try live booting (no need to install) Ubuntu 18.10 and tell us if the newer version of libinput there is any better?
http://releases.ubuntu.com/18.10/ If it's not then please report the bug to the libinput developers here: https://gitlab.freedesktop.org/groups/libinput/-/issues and tell us the new bug ID. ** Tags added: bionic ** Changed in: libinput (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1808881 Title: Unwanted touchpad movements on tap with Synaptics touchpad on DELL Inspiron-3521 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libinput/+bug/1808881/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
