I have the same problem on ubuntu 14.04 with elan touchpad. I use a optimus laptop with nvidia 640m gpu and intel gpu. Using the touchpad causes ubuntu to freeze, and it is possible to unfreeze going to and from a virtual console. I am using nvidia 331 and prime.
I have the same problem on ubuntu 14.04 with elan touchpad. I use a optimus laptop with nvidia 640m gpu and intel gpu. Using the touchpad causes ubuntu to freeze, and it is possible to unfreeze going to and from a virtual console. I am using nvidia 331 and prime.