Re: [RFC][PATCH 00/11] Android PM extensions

Rafael J. Wysocki
2009-01-31T23:20:04Z

On Saturday 31 January 2009, Arve Hjønnevåg wrote:
> On Sat, Jan 31, 2009 at 7:41 AM, Alan Stern <stern@rowland.harvard.edu> wrote:
> > On Fri, 30 Jan 2009, Brian Swetland wrote:
> >> Imagine the computer in question is a cellphone which is going to need
> >> to wake up when a call comes in to do traditional cellphone things, like
> >> ring, bring up the incall UI (so the user can answer/cancel), etc.
> >
> > Yes. So what? Nothing I said prevents the computer from waking up
> > when a call comes in. What I said was that when the user tells the
> > computer to suspend (e.g., by writing "mem" to /sys/power/state), the
> > computer should suspend even if some wakelocks are still locked.
>
> But this could prevent the phone from ringing. What if the user-space
> code that is responsible for playing the ringtone has been notified
> that a call is coming in and starts reading the audio file with the
> ringtone. At the same, the user, unaware that someone is calling,
> presses the power button. If we ignore the wakelock in this situation,
> the phone will not ring.

What if the user decides to power off the phone and a call comes in at the
same time?

Rafael