Re: update: n8x0 idle power problem

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Yes. I took off N810's battery and powered it with an external power supply.

By different power rails, you mean dissecting N810 to do finer-grain
power measurement?

Hope any people who have also done this 'overall' measurement can
confirm my observation or point out my mistake.

Best Regards,
--
Felix


On Mon, Oct 26, 2009 at 6:57 PM, Girish S G <girishsg@xxxxxx> wrote:
>
>
>> -----Original Message-----
>> From: linux-omap-owner@xxxxxxxxxxxxxxx [mailto:linux-omap-owner@xxxxxxxxxxxxxxx] On Behalf Of Felix
>> Xiaozhu Lin
>> Sent: Monday, October 26, 2009 5:36 PM
>> To: linux-omap@xxxxxxxxxxxxxxx
>> Subject: update: n8x0 idle power problem
>>
>> Hi, All,
>>
>> Regarding the idle power problem I've mentioned in a mail last weekend:
>>
>> http://marc.info/?l=linux-omap&m=125634121921583&w=2
>>
>> I have spent more efforts on this problem. By comparing with PM debug
>> messages from Maemo kernel, it seems full-retention in linux-omap
>> 2.6.28 has no problem on n810. Moreover, I've observed that l-o kernel
>> consumes more power in other power states (e.g. when USB is plugged
>> and the screen is dim but not off, Maemo kernel takes ~90mA@xxxx while
>> l-o kernel takes ~180mA@xxxx). As a result, I think the extra power
>> may not be consumed by OMAP processor core but by some device.
>
> I assume you are measuring at the battery level(?). If you have measurement done across
> different rails then it would help to understand who is consuming more.
>
>
> -Girish
>
>
>
>
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