As an example the terminal. If I click on the scrollbar and move the mouse up or down the scrollbar occasionally moves slowly so that the mouse pointer is at the top of the screen and the handle just moved a few centimetres. And then again it moves at regular speed where the handle moves underneath the mouse pointer and remains there.
What is this? How do I turn off that slow thing as it is very annoying to me?
I have XFCE and nVidia.