LED notification

Jason Cawood jason at jasoncawood.com
Sat Oct 11 20:53:43 CEST 2008

this is exactly what I was trying to get at.  I just couldn't find the
correct words to communicate this effectively.  

My reason is because if I suspend my phone then I walk away and return
to it, I have no visible notification I missed an event unless I touch
the screen and see if my phone is still suspended.  If I'm not
constantly touching the screen to make sure it's still suspended and I
did miss an event.  Then my power consumption just increased and my
battery life is quickly diminishing. 

On Sat, 2008-10-11 at 12:20 +0100, Andy Green wrote:
> Hash: SHA1
> Sam Kuper wrote:
> > 2008/10/9 Andy Green <andy at openmoko.com <mailto:andy at openmoko.com>>
> > 
> >     Robert Norton wrote:
> >     > 2008/10/9 Robin Paulson <robin.paulson at gmail.com
> >     <mailto:robin.paulson at gmail.com>>:
> >     >> the main cpu is suspended, like in the neo, but the power
> >     management unit is not
> >     > I'm sure I recently read a datasheet for a PMU which supported various
> >     > flash patterns for LEDs even during suspend. Unfortunately I can't
> >     Not really a PMU but an i2c device for just doing that.  We might be
> >     using one or another in future products
> > 
> > 
> > To me, having the phone able to perform basic notification functions
> > (LED blink, vibrate, make a sound) on certain events, even when the
> > phone is on standby, seems like a very desirable - not to say obvious -
> > feature.
> Well you can simply wake and do "event" type actions like vibrate and
> flash LEDs then, the stimulus you are responding to like incoming call
> will be a CPU wake event so that lot will work.
> What can't be done (because of a completely Linux-centric POV in the
> design) is anything while the CPU is off in suspend.  We can leave a LED
> on during suspend, but there is no intelligence to flash it or whatever.
> So overall it's not quite as bad as it sounded I hope.
> - -Andy
> Version: GnuPG v1.4.9 (GNU/Linux)
> Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org
> iEYEARECAAYFAkjwjA0ACgkQOjLpvpq7dMqx1ACeLcpilImxowZ4IAYo2HnmQKGy
> OG8Anj9t65Je7ZS4X9/nMXnG3RNh0ezz
> =FaNT

More information about the community mailing list