Tracking power leackage in my freerunner
rixed at happyleptic.org
rixed at happyleptic.org
Wed Jan 27 13:52:29 CET 2010
-[ Wed, Jan 27, 2010 at 12:41:36PM +0100, Fox Mulder ]----
> rixed at happyleptic.org schrieb:
> > I monitored power consumption all day long (from full battery to empty).
> > I observed that the average current consumption (from /sys/.../current_now)
> > is 78mA when "idle". My battery, at full charge, is shown to store 1.1Ah
> > (according to /sys/.../charge_now), which leads to battery life of 14h which is
> > exactly what I observed.
> >
> > So, I suspect that 78mA when idle, supposed to be in deep sleep mode with
> > a #1024 fixed device is far from ideal.
>
> I thought the #1024 fix is only helping while the freerunner is
> suspended. For me this fix only changed the current which was consumed
> while suspended and extended my standby time by a factor of nearly 2x.
So what do you have in /sys/class/power_supply/battery/current_now
when idle and not charging ?
Here is for instance a simple script that will log interresting values
every 30 seconds :
#!/bin/sh
log="$HOME/power.log"
while true ; do
(
date +"%Y-%m-%d_%H:%M:%S"
cut -d' ' -f 4,7 /proc/apm
cat /sys/class/power_supply/battery/charge_now /sys/class/power_supply/battery/current_now /sys/class/power_supply/battery/voltage_now
) | xargs echo
sleep 30
done >> $log
I would be very interresting in comparing various people results.
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