On Wed, 9 Mar 2005, Nigel Cunningham wrote: > I like the per-instance idea better. If I have, for example, two > harddrives on the same bus, I might have very different usage patterns > for them. I might want one to spend most of it's time powered down, and > the other to be always on. I don't object to this in principle, and I can see how it might be useful. But at the price of being heretical, consider one of the existing precedents. As far as I know, the central device power management interface in Windows only lets users specify how long to wait before suspending the display and how long to wait before spinning down disks. That's all, just two settings. No per-device stuff, no nothing. This isn't to say that we should copy Windows. However it does show that a very complex set of controls might not be needed. Alan Stern