Hunting sleep bug: how to switch to hibernate mode?

Since 10.13.4 and also with 10.13.5 I found a complex bug related to:

  • power management,
  • different levels of sleeping modes.

Upon exiting from different sleep states, MacOS X is either in a totally unresponsive state or already crashed (black screen, keyboard not responding, same state 10 minutes later).


I would like to test this different levels of sleep modes with a full control so as to test one at a time.


Which command permits to manually switch MacOS X immediatly in hibernate mode?


It it possible to track down these problems with the debugging kernel?

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This is a developper-level question.

I am talking here of kernel problems (I am a developper, I work on Unix internals and security bugs).


Do you know of debugging functions inside the 10.13 debugging kernel which might help to

reproduce and analyse this kind of problem?

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dazuelos
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I’m confused about how your code is running on the hibernate path? Last time I checked Apple does not support that (for example, while you can write a custom disk driver for macOS, it’s not possible to write a custom disk driver that supports hibernate).

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