When I move the cursor using the trackpad of my Aftershock notebook, it sometimes freezes in place. Keyboard still works. The problem happens only with trackpad, not with mouse. The only way to unfreeze the cursor is to switch to virtual terminal
Ctrl + Alt + F1 and back to X
Ctrl + Alt + F7.
Until I move to a newer version of Ubuntu with this updated version of X Server, I will have to survive by switch to virtual terminal🙂
Tried with: NVIDIA 765M and Ubuntu 14.04