Has anyone else noticed a problem with this?  I've entered a bug report here:
https://bugzilla.redhat.com/show_bug.cgi?id=1217844

Basically, the screen freezes at random times; however the mouse cursor moves 
freely.  

I was able to find a kubuntu report which seems to describe the issue and I also 
referenced it in the ticket:  https://bugs.launchpad.net/kubuntu-ppa/+bug/1384512