Comment 118 for bug 1220426

It's unlikely to be due a change in the NVIDIA driver, since we (NVIDIA) have not yet identified a root cause for the touchpad freeze.

As this problem is highly sporadic, and can take several hours in some cases to reproduce, if it reproduces at all, we should probably wait for more confirmations that it is no longer reproducible in Utopic before concluding that it has indeed been fixed there.