> For the sake of clarity, are you saying that clutter ought to be more energy efficient than 2D metacity on modern hardware generally? That seems to be the implication given you're contradicting my comment.
Yes, that is what you should find. It's likely to be very close but a good test is a bunch of open windows and then dragging one window around the desktop rapidly.
> Re dual-graphics and switching, I thought airlied has got that working?
Mm... I thought I was up to date on this but perhaps you know more than I do. My understanding until now has been that dynamic graphics switching requires the same Gallium state tracker in both drivers since the entire hardware state has to be moved from one graphics card to the other. Perhaps this is the milestone that has been reached to which you are referring?