Ok, to clear some confusion, does CPU off means that CPU is completely 
switched off, or is it run at a low clock rate?
 
If CPU is completely off, then how does the AlarmManager even work, and how 
does the phone receive an incoming call or an SMS?
 
I'm sure CPU will be required to run some basic OS services, right? Like 
the phone and SMS, and the alarm-manager itself.
 
 

On Monday, April 2, 2012 7:05:28 PM UTC+5:30, Dan wrote:

>
>
> On Mar 30, 10:06 pm, Dianne Hackborn <[email protected]> wrote: 
> > On Android "sleep mode" is the screen being off.  What do you mean by 
> > "sleep mode"? 
>
> Given the nice chart of CPU/Screen/Keyboard states at: 
>
> http://developer.android.com/reference/android/os/PowerManager.html 
>
> If having PARTIAL_WAKE_LOCK held allows the screen to go off (and you 
> want to say 'On Android "sleep mode" is the screen being off'), what 
> do you call the state that device will go into if PARTIAL_WAKE_LOCK 
> is not held? 
>
> Once we have the name agreed upon (for conversation, since it can only 
> be reached if some form of WAKE_LOCK is not held, let's say "not 
> awake") 
> the question is what do you do to get the device to try to go to a 
> state 
> of CPU/SCREEN/KEYBOARD all Off. 
>
>         Dan Schmitt

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