I was using the sleep feature a lot on my Windows 7 laptop. But after a fresh install (with MDT2010), de sleep button was grayed out, thus unavailable!
After some searching, the Standard VGA adapter got my attention. MDT hasn’t installed my videocard driver properly (or I forgot to select them, whatever ).
Installed the drivers for my nVidia Quadro:
After a reboot, this looks more like it:
The sleep feature is available again!