Hello Darren, On Saturday 19 Sep 2009 04:28:40 Darren Hoo wrote: > > Again, on my box with ipw2200 device, 2.6.30 still presents the wireless > > folder. > > with my 3945ABG card, 2.6.30 does not have this folder either. > Isn't there a better way to check whether it is a wireless card? > > Also I want to know how does wireless card power saving work? > I know that I can set the signal power of the card using iwconfig like > # iwconfig wlan0 txpower 10 > > but changing /sys/class/net/*/device/power_level does not change > the tx-power that iwconfig reports. > > does this power_level have anything to do with that txpower? > will reducing txpower by iwconfig help power saving at all? >
Following is what I had done for the wireless-ipw-power module
# LP: #369113
# Kernel's 2.6.29 and above have been reported
to be missing
# the $DEVICE/wireless folder.
dev=`basename $DEVICE`
ret=`$IWCONFIG $dev >/dev/null 2>&1`;
if [ "$ret" = "0" ]; then
# add the interface name to the list
WIFI_IFNAMES="$WIFI_IFNAMES
${DEVICE##*/}"
fi
Perhaps, the same should be done for iwlwifi cards also. What we do here is
just run iwconfig on the device. If it is not a wireless device, it would give
you a bad exit status. That is what we are relying upon.
I'll do the same for iwl-power module also.
I'm not sure about the power saving. Wild guess is that if you know what your
workload is (eg. server with a wireless card), you can power tune your device.
Ritesh
--
Ritesh Raj Sarraf
RESEARCHUT - http://www.researchut.com
"Necessity is the mother of invention."
signature.asc
Description: This is a digitally signed message part.
