Re: h5550 wifi power down

Sorry, cut and paste error.

Wifi consumes of course 390-140=250 mA, which is a lot!

When Bluetooth is on, the power consumption slightly increases, but the
increase is marginal comparing to variation of the current caused by CPU
activities. I estimate is as 155-140=15mA. The precision of my
measurements is not very high, say +-5mA.

Alex

On Fri, 27 Aug 2004, Alex Bystrov wrote:

> More experiments on this subject.
>
> iPAQ h5550 naked (no expansion jackets):
> Operational mode, wifi driver (usbvnetr loaded)
> backlight full -- 560mA -- about 2 hours battery life
> backlight off -- 390mA -- about 3 hours
> 560-390=170mA consumed by the backlight
> wifi driver unloaded, backlight off -- 140mA -- about 9 hours
> 390-155=135mA consumed by wifi
> the same, Bluetooth radio on -- 155mA
> the same, bnep on, IP connection established -- 155mA
>
> The above figures are not very accurate, they are the average values
> obtained from /proc/asic/battery.
>
> Now testing the sleep mode.
> wifi driver unloaded, MMC card removed, Bluetooth off -- 14.5mA (over 1.5
> hour period). This gives us about 90 hours battery life (4 days). This is
> inconsistent with my previous experiments when the expansion jacket was
> installed (an additional battery and a microdrive IBM 1G). Need to check
> this thoroughly.
>
> Alex
>
>
>
> On Fri, 27 Aug 2004, Alex Bystrov wrote:
> > Under the same setup, but with the driver loaded the unit lost further
> > 20% in 10 hours of sleep. The orange LED was off as I managed to guess the
> > time and to press "suspend" so that it was caught in the "off" state.
> >
> > So, the driver unloading helps, but something else drains the power. I'll
> > try unloading Bluetooth and MMC card drivers also. I am having doubts now
> > regarding the CPU being suspended properly.
> >
> > I am talking about hh36.11 kernel on h5550 and the unstable gpe.
> >
> > Alex
> >
> >
> > On Thu, 26 Aug 2004, Alex Bystrov wrote:
> > > Is it the fault in the driver that it cannot be removed without the above
> > > hassle? I am experimenting now checking battery life in the sleep mode.
> > > The first impression is that without the driver the consumption is lower.
> > > Still the unit looses about 30% in 20 hours and I am using the expansion
> > > pack with a second battery.
> >
> >
> >
>
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Received on Fri Aug 27 18:22:58 2004