Last time I tried it, flat didn't work correctly when using a touchpad, only when using a mouse. Touchpad flat profile was flat up to a certain velocity, but w

Last time I tried it, flat didn't work correctly when using a touchpad, only when using a mouse. Touchpad flat profile was flat up to a certain velocity, but when you exceeded that it accelerated a lot. Flat profile on a physical mouse worked correctly. Even if I yanked the device, it wouldn't accelerate. This is one of the reasons why I'm sticking to Ubuntu 16.04: "xset m 1 0" disables all acceleration on xinput.