Graphic Anomalies and Kernel Crash

Running El Capitan and experiencing sporadic graphic artifacts that look like smearing: you click or drag a window and it either replicates across the screen or smeears as you drag. The whole screen then becomes impossible to navigate (yet the mouse moves and if you randomly click on something valid the machine acts). Some fo the time, you get a full kernel panic and a grey screen.


Can anyone help analyze the logs and/or give some trouble shooitng steps beyond the obvious. My research suggested the GeForceTeslaDriver.bundle but disabling it removes key features such as full screen Quicktime.


Thanks for any help.