Wireless interface power

[Javier Cardona]

Forwarded to the list.  Maybe someone else has an answer for this:

---------- Forwarded message ----------
From: Andrey Yurovsky <andrey at cozybit.com>
Date: Apr 18, 2007 9:33 PM
Subject: Re: msh0 interface behavior change proposal
To: John Watlington <wad at laptop.org>, Javier Cardona <javier at cozybit.com>


Hi John.  We tried suspending to RAM with the suspend6 (I think) and
stock firmwares on build 384 and power was definitely cut:
1) attached debugger to WLAN module
2) # echo m > /sys/power/state
3) system suspends, [JTAG] debugger is no longer attached to the WLAN
module's processor

I checked /sys/power/state and it has 'mem' and 'disk' options, so I
assume 'mem' is right.  Is there something I'm doing wrong or is there
some other way to have it suspend but keep the power to the WLAN
module on?  Thanks,

  -Andrey


On 4/18/07, John Watlington <wad at laptop.org> wrote:
>
> Javier,
>     Power to the WLAN is NOT cut during suspend.  My explanation of
> power domains
> needs clarification.   The WLAN is powered almost continuously
> (possibly even when
> the laptop is powered off).   Hence it is in the "green" domain, not
> the yellow domain.
>
> (...)
>
> wad
>
> On Apr 18, 2007, at 10:07 PM, Javier Cardona wrote:
>
> > All,
> >
> > (...)
> > PS.  Unfortunately the wlan power is cut off when the laptop is
> > suspended.  Otherwise we we would have basic autonomous mode up and
> > running by now (
> > http://wiki.laptop.org/go/
> > Hardware_Power_Domains#Powered_in_Suspend_.28Yellow.29
> > ).
> >