[Bug 80980] Re: power management on ipw2200 and ipw3945

[Nic]

A thread in ubuntu forum is open on this topic:  
http://www.ubuntuforums.org/showthread.php?t=339089

There was a great suggestion of a better solution for this problem from
largecat:

Some helper functions if your 3945 card is not eth1 or you have more
then one card:

#!/bin/bash
# Power saving setting for the Intel 3945 wireless adaptor

VENDOR_ID=0x8086
DEVICE_ID=0x4222
IWPRIV=/sbin/iwpriv

#
# Find all the Intel 3945 adaptors based on the vendor and device ids
#
function findIntel3945s {
    INTEL3945_IFNAMES=""

    for DEVICE in /sys/class/net/*; do
        if [ -d $DEVICE/wireless ]; then
# See if $DEVICE is an Intel 3945abg
            if [ -f $DEVICE/device/vendor ] &&
                [ -f $DEVICE/device/device ]; then
                if [ `cat $DEVICE/device/vendor` == $VENDOR_ID ] &&
                    [ `cat $DEVICE/device/device` == $DEVICE_ID ]; then
# Strip off the leading path to get the interface name
                    IFACE_NAME=`echo -n $DEVICE | sed 's/.*\///'`
# and add it to the list of interfaces
                    INTEL3945_IFNAMES=$INTEL3945_IFNAMES" "$IFACE_NAME
                fi
            fi
        fi
    done
}


#
# Set all the adaptors into battery power saving mode
#
function setIntel3945s_battery {
    findIntel3945s;

    for DEVICE in $INTEL3945_IFNAMES; do
        $IWPRIV $DEVICE set_power 7
    done
}

#
# Set all the adaptors into ac power saving mode (none)
#
function setIntel3945s_ac {
    findIntel3945s;

    for DEVICE in $INTEL3945_IFNAMES; do
        $IWPRIV $DEVICE set_power 6
    done
}

Save the above as something like /etc/acpi/intel3945_pwr.sh and you can
then use it from scripts as follows:

#!/bin/bash

# source the helper functions
. /etc/acpi/intel3945_pwr.sh

# Set all Intel 3945 wireless adaptors to battery power saving
setIntel3945s_battery;

Replace _battery by _ac in a script to turn power management off.

-- 
power management on ipw2200 and ipw3945
https://launchpad.net/bugs/80980

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