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How to wake up the machine

This is a note for issues to wake up the system from sleep.

In Ecalir, we have two major changes regarding the power management:
1. we are showing keygaurd after system resume.
2. only certain predefined keys can be used to wake up the system.

Here are something users need to know
1. You can only use ESC, Menu, left, right, up and down keys to wake up the system.
2. To wake up the system ,you have to hold the keys mentioned above for at least 1 second.
3. You can push menu key when keyguard screen showing up to unlock screen.
4. You can use mouse to turn the wheel on the keyguard screen to unlock screen.