Hi, I'm working an a display driver for a card(PCI) that does not only serves as a graphic card. So I have a service provider for my Framebuffer driver (declared in the bundle bits of FB and receive it in the start.) Now I'm worried about power management. We all know that diplay can go to sleep even if the system does not go to sleep. This is not a problem. The problem occurs if the provider receive a notification to go to sleep before the framebuffer does. In which case the framebuffer will talk to nobody when wnating to go sleep afterwards. Q1: will IOKit be smart emough to sleep my drivers in the dependency order ? I.e: Framebuffer first, provider second. Q: if no to Q1, can I use the registerInterrestedDriver mechanism in my framebuffer to make sure it will shut itself down (and notify the OS it has shut down) before the provider go down ? Francis _______________________________________________ darwin-kernel mailing list | darwin-kernel@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.