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

Pavel Machek
2009-02-02T11:56:34Z

On Sun 2009-02-01 00:20:04, Rafael J. Wysocki wrote:
> On Saturday 31 January 2009, Arve Hj?nnev?g 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.

Yes, you don't want to write "mem" to /sys/power/state on android. You
want to write something like "auto-mem" there.

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

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