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My black screen was caused by Bluetooth wake
Authored by: gbnyc on Jul 16, '07 08:46:53AM

My MacBook often woke to the password screen (I have it set to require password on wake), but after entering the password, it would go a black screen, except for the cursor (arrow) that was visible and controllable. Every keystroke, however, just got an error sound and no action.

In case anyone has this same version of the "black screen," here's what I figured:

It was happening only when I had my Bluetooth mouse present (I don't have a BT keyboard, so don't know if would cause the same problem), and I had the MacBook set to allow Bluetooth devices to wake the computer, and the mouse was moved at some point while the lid was closed.

I guess it would wake and then sleep again while closed (I don't have an external monitor, so couldn't see any of this), and that somehow caused the black screen when I later opened up the MacBook and entered my password.

Of course, I've now turned off the option to let Bluetooth devices wake the computer (Bluetooth Preference Pane), and so far, no more black screens.

Hope this helps someone -- I've been searching and googling "black screen" for a while, and none of the suggestions I've found helped for my set-up. (FYI: Apple thought it was a battery issue, but while trying to track down the source of the problem, I figured out that my black screen happened even if battery was removed and MacBook was plugged in, so clearly that's not the cause.)



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