linux-kernel - Re: [Bug 10797] Something is consuming power after shutdown

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Date:	Wed, 28 May 2008 08:52:47 -0300
From:	"Renato S. Yamane" <yamane@...mondcut.com.br>
To:	linux-kernel@...r.kernel.org
CC:	Arjan van de Ven <arjan@...radead.org>
Subject: Re: [Bug 10797] Something is consuming power after shutdown

Renato S. Yamane wrote:
> Arjan van de Ven wrote:
>> "Renato S. Yamane" wrote:
>>> After poweroff, something still working and consuming power. So I
>>> loss ~4% of my battery charge in each 12h.
>>
>> the most obvious cause could be Wake-on-Lan, that leaves a part of the
>> system active (specifically, the network card). With the "ethtool"
>> program you can queary and set the state of this.
> 
> My network card have option WOL "disabled"
> 
> # ethtool eth0 | grep Wake
>         Supports Wake-on: pg
>         Wake-on: d
> 
>> Similarly, but less likely, there is wake-on-serial and wake-on-usb, in
>> theory those are possible too but I've yet to see one of those on any
>> of my machines.
> 
> # cat /proc/acpi/wakeup
> Device  S-state   Status   Sysfs node
> LID0      S4    *enabled
> RP01      S4     disabled  pci:0000:00:1c.0
> RP02      S4     disabled  pci:0000:00:1c.1
> RP03      S4     disabled
> RP04      S4     disabled
> USB1      S0     disabled  pci:0000:00:1d.0
> USB2      S0     disabled  pci:0000:00:1d.1
> USB3      S0     disabled  pci:0000:00:1d.2
> USB4      S0     disabled  pci:0000:00:1d.3
> USB7      S0     disabled  pci:0000:00:1d.7
> MODM      S4     disabled  pci:0000:00:1e.3
> PS2K      S4     disabled  pnp:00:07


I test two times as commented in [1] and I can see that this problem
don't hapen if, before shutdown, I close LCD Display (activing LID to
hibernate).

[1] <http://bugzilla.kernel.org/show_bug.cgi?id=10797#c1>

So, to shutdown laptop with no battery change, is necessary:

1) Active LID (closing LCD Display). With this, my laptop will
hibernate, so is necessary wake-up again.
2) Shutdown

Best regards,
Renato S. Yamane
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