Or are the Quadro xxxxMs the only officially supported mobile graphics cards?
Ok, thanks for replying so quickly.
You can get an inkling of operational M video cards, that may not be 'supported', but do work after applying the hack, by going to Benchmark Results and selecting Laptops under the tab Computer type. That shows you 50 laptops today, and all that have a score with MPE On greater than 0 have hardware MPE enabled.
Hint: First select Laptops, then sort on 'MPE On' by clicking on the column header and scroll down till all the 0 scores are out of view.
Ok, thanks. Have just submitted the (rather pitiful!) results of my current desktop.