Comment 5 for bug 1277812

I've been trying to find an answer to why the scroll wheel doesn't work and this is the closest thing to it.

Scrolling with the mouse wheel in Chromium, terminal, LibreOffice works normally. It jumps more than I'd like, but it scrolls after one notch (you can feel the notches as you scroll).

Scrolling with the mouse wheel in Nautilus, Synaptic Package Manager, Evince is poor. If you keep scrolling it will eventually scroll up / down but it is very sporadic and jittery. The faster you scroll the sooner it moves. Using evince as an example, I just scrolled up one notch at a time (i.e. slowly - about one notch every half second) and the page moved after the third notch. I then changed directions and it moved after the seventh notch. Try again and get different results.