I believe this is a feature, there's a checkbox "Ignore touchpad when a USB mouse is connected" in System Settings
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1604429 Title: Inserting a USB mouse disables touchpad input for Unity8 To manage notifications about this bug go to: https://bugs.launchpad.net/mir/+bug/1604429/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs