blink AUX or power light while suspended?

Sebastian Krzyszkowiak seba.dos1 at
Mon Aug 31 19:40:53 CEST 2009

On 8/31/09, Nathan Kinkade <nath at> wrote:
> On Mon, Aug 31, 2009 at 07:01:28PM +0200, Sebastian Krzyszkowiak wrote:
>> > Is that halving the theoretical suspend time (I thought someone was
>> > claiming a suspend life on about 100 hours) or the real suspend time?
>> > If we're talking about reducing suspend time to 50 hours, I'd be fine
>> > with that.  Honestly, I don't think it'd be that much of an issue as I
>> > would not expect that LED to be on for long.  The point of lighting
>> > the LED would be to get my attention if I was away from my phone when
>> > a call or sms came in.  Obviously the LED would be cleared once I
>> > checked the event.  So, for my usage, I wouldn't expect that LED to
>> > ever be lit for more than 30 minutes.
>> >
>> > -Steven
>> >
>> > _______________________________________________
>> > Openmoko community mailing list
>> > community at
>> >
>> >
>> On GTA02A5 litting AUX LED will reduce suspend time about 10 times (8
>> mA suspend current, 50 mA LED current)
> My understanding is that most commercially sold Freerunners are revision
> 6.  Is that incorrect?  If it is correct then according to what someone
> else posted, the AUX light should only consume around 6mA.
> I too would be willing to live with reduced battery life to have this
> feature.  Like Steven said, it's not likely that the light would remain
> lit for too long without me noticing it, so the decrease in battery life
> would certainly be less than 50%, maybe even only reducing it by 10% or
> 20% during normal usage.  And if these recent reports of adding a 10uF
> capacitor to resolve ticket #1024 are true, then that could mean that
> even in a worst case scenario the device could still remain suspended
> with the AUX light illumated for perhaps 50 to 70 hours.
> For those with revision a5 or who don't want to risk/bother with lower
> battery life, this feature could be a configuration option.  Also, I
> don't know what drain it puts on the battery, but waking the system just
> to check if a call or SMS was missed surely has some power consumption
> consequences that can't be totally discounted in this equation.
> Nathan

A5 isn't prototype, it was sold to end-user for some time. And waking
system is bad idea.

PS. I have A5 and I'm already using AUX LED to blink when there are
missed calls or unread messages using opimd interface. I'm just saying
facts (well, that was me who noticed that power-hungry aux led) ;)

Sebastian Krzyszkowiak

More information about the community mailing list