Thanks, indeed this is due to the graphic card... I have 2 of them on his laptop and when I force the ati one, it solves the problem. However if I leave the built in Intel HD chip active as it is by default, it crashes.
I had an old mouse that gave irratic scroll wheel signals. It still worked but I did notice it jumpy when trying to scoll windows on occasion (all windows, not just Qt). I don't know what you are using but I would make sure the problem is not hardware.
I know, and I want to, but I don't think I can because I can't create a good compilable example that reproduces the error. If you simply create a dockWidget that has a listView and you try to scroll it is fine. Even though I tried to configure it the same way.
I am not sure what exactly in my app triggered this bug.