Well, Dell & Matrox were not much help at all. I took Autodesk out of the equation after I discovered my 3D Pipes screensaver wouldn't run either.
But I did find a workaround solution. It came from another G450 user who was having the same problem with another OpenGl application. Adusting the hardware acceleration setting in Windows to the second lowest setting, allowed both the screensaver and Inventor to run. I haven't noticed any side effects yet, but its seems to be running fine.
See you in a few weeks!!
