After removing xserver-xorg-input-libinput third input device appears, a 'PS/2 Generic Mouse' and both mice become evdev devices so it doesn't look like a libinput problem.
** Package changed: xserver-xorg-input-libinput (Ubuntu) => xserver- xorg-input-synaptics (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1876991 Title: Touchpad started appearing both as a touchpad and as a mouse input devices after upgrade to 20.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-synaptics/+bug/1876991/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs