am using AutoCad 2002, does that count? don't need openGL for my uses, but 3D modelling works.
it pauses with some commands, processor use goes to 100% but starts working again-- the pauses happen with certain commands (Scale) and happened this morning with moving an xref around. the pause is not 100% repeatable, first scale command will cause a pause, 2nd or 3rd will not, then next time i scale will cause the pause.