Comment 12 for bug 1637688

> Lastly if we try that smooth scrolling, how do you configure it?

I don't think you can directly configure this, it's already enabled behind the scenes and used for devices that can generate such events.

What you could do is to follow and repeat https://bugzilla.gnome.org/show_bug.cgi?id=774430 comment 11, that is, check what your current input method is, and if it's xim then switch to ibus. (I'm suggesting this without having any idea what's going on :P) This could get us one step closer to locating the problem, and maybe even locating some correlation with that other bug.