Ubuntu – KDE scroll speed is not proportional to wheel speed

I was using a Logitech M510 wireless bluetooth mouse and was experiencing this issue with Ubuntu 18.04. I noticed that xev was not detecting any events for the scroll. To solve my issue, I turned off the mouse and then turned it back on and it worked.

This feature is often referred to as mouse scroll acceleration, or mouse wheel acceleration. Unfortunately, this feature is not implemented yet.

Here is the corresponding XServer issue (reported by me originally, also my patch...), this is the launchpad report, and here is a similar report for lipinput in Wayland.

I guess you could help with your vote on the issue. Or with an updated patch for libinput.

I implemented such a feature in user space here (mouse-scroll-wheel-acceleration-userspace). This will increase the scroll speed, or accelerate the scroll speed. You would just run this in the background, with your preferred options. The code is quite simple Python code, and should be easy to modify as well.