Hi. Hmm. Perhaps I should have added to that last reply that recognising that they store similar information doesn't mean I think they need the same high-level routine for both state transitions. I'd really like to see each driver have some sort of state machine controlling its power management, into which these calls were just another input (an important one, but just another alongside information about policy, whether we're on battery (UPS or laptop) or AC, whether the device is actually being used and so on. Nigel
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