pmset: gpuswitch 2? What in the...?

[J the Ninja]

I've been studying up a little on the pmset command today, after being frustrated by the limits of the Energy Saver prefpane, and on looking at it's setting, I noticed it had an option called "gpuswitch". Seems like it should just be the switch between graphics cards......except it's value is "2". Every other parameter I can find for pmset that allows values other than 1 or 0 is something that is looking for a number of minutes, rather than a two-way switch. This obviously isn't a timer, so.....is it some sort of 3-way switch? Anybody know what this one does? The man page is no help, it apparently hasn't been updated for this, and my Google-fu got me nowhere.

I guess I could just run "sudo pmset -a gpuswitch 1" and see what happens, but I'm a little loathe to sudo something if I'm not sure what will happen.

 

[Mercellus]

I've been wondering what settings the gpuswitch setting will take as well, although I'm a bit scared to play around with it.

 

[dual64bit]

I've tried 0, 1, and of course 2 none seem to give any affect. Perhaps a logout or restarted after adjusting might do something, but haven't gone that far yet.

We need an easy switch for switching graphics cards in the MBP.

 

[chabig]

I bet we'll get one in Snow Leopard.

 

[darwinian]

What this MAY do (and nice find, by the way) is it paves the way for a developer (calling all coders) to write a little menu bar utility that enables switching from the menu bar. I have the "require password" for preferences business set, and it's annoying to open System Prefs each time to do this.