So I've been having this problem for a while. I close the lid on my iBook and put it to sleep. When I open the lid again to wake up the computer, sometimes the password dialog will not show up, and the screen will be on, but remain black. The password dialog does show up if I close the lid, and put the iBook to sleep again before rewaking it up. This is a little annoying though, so I'd like to know if there's anything I can do to fix this. Thanks in advance for any suggestions.