Re: PCMCIA Power management

While I am at it, has anyone tried the linksys wpc11 card? (and/or the
associated aceess point)? (It is supported by the wvlan_cs.o modules, I
believe.)

Thanks.

On Friday 20 July 2001 12:16, Joseph J. McCarthy wrote:
> Could some or all of you that were involved in this thread submit info to
> the supported hardware part of the wiki.
>
> There is currently no wireless solutions listed there.
>
> Thanks.
>
> On Friday 20 July 2001 11:22, James ''Wez'' Weatherall wrote:
> > --
> >
> > On Thu, Jul 19, 2001 at 04:26:49PM +0100, Will Stephenson wrote:
> > > On Thursday 19 July 2001 2:48 pm, James ''Wez'' Weatherall wrote:
> > > > Does anyone know how difficult it is to put a WaveLAN card into sleep
> >
> > mode
> >
> > > > from user space?
> > > >
> > > > Obviously, I could just use "cardctl eject" to do it, but that's
> > > > rather heavyweight when all I really want to do is switch the card
> > > > off for a
> >
> > short
> >
> > > > period to save power, without tearing down DHCP and so on.
> > >
> > > I'm experimenting myself, but do you think the various 'iwconfig eth0
> > > power....' options might be useful here?
> >
> > Hmm, interesting. It seems the version of iwconfig on my ipaq is
> > different than on my laptop, since the manpage on my laptop gives a power
> > option that is not recognized (timeout) or, perhaps, not supported by the
> > card. However, using:
> >
> > iwconfig eth0 power on
> >
> > Has some affect. On a relatively busy wireless network (university
> > office/clasroom building) I get a barely visible, flickering power led,
> > but the network stays up, and functional. When I browse slashdot.org
> > with dillo, for example, the light comes on solid while loading.
> >
> > I'll try it in the other building, where there's a lot less wireless
> > traffic. I'm guessing it'll go to sleep, and stay that way.
> >
> > Sounds like what James is looking for, perhaps?
> > --
> >
> > Looking at this, it works rather well. Much better than under CE at any
> > rate. The LED will never go completely off - if it did that then no-one
> > would ever be able to transmit to it! :)
> >
> > I was really looking for some sort of low-latency on/off API, so that I
> > can run my own low power protocol stack, but the in-built stuff looks
> > very promising.
> >
> > Cheers!
> >
> > ---
> > James "Wez" Weatherall
> > "The path to enlightenment is /usr/bin/enlightenment"
> > Laboratory for Communications Engineering, Cambridge - Tel : 766513
> > AT&T Labs Cambridge, UK - Tel : 343000
> >
> >
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> > irc://irc.openprojects.net #familiar

-- 
Joseph J. McCarthy, Assistant Professor
Department of Chemical and Petroleum Engineering
University of Pittsburgh
1249 Benedum Hall Pittsburgh, Pennsylvania 15261
Ph. 412-624-7362
Fax 412-624-9639
mccarthy_at_engrng.pitt.edu
http://granular.che.pitt.edu