portable, portables and power usage

comp.os.linux.portable - Linux OS on portable PCs.


portable >> portables and power usage

by Gumby » Sun, 17 Apr 2005 08:58:12 GMT


I have a thinkpad T41, it has a wireless ethernet modem (ipw2200 or
whatever). I'm not using it (the ipw2200 module is not loaded)
since all I use is the wired 1000base (e1000 module)
is the ipw2200 hardware still sucking power or is the laptop smart enough to
know it's not used and so shuts off the power to it?
Mark

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portable >> portables and power usage

by pa » Mon, 18 Apr 2005 05:24:34 GMT






I don't know about the thinkpad, but my laptop has a key combination to
turn the radio on and off. There is no LED indicator, but I can modprobe
ipw2200 and run the iwconfig command (part of wireless-tools). The output
is different when the radio is turned on or off. Once I know the radio
is off I can modprobe -r ipw2200 to clean up.

Radio on:

eth1 IEEE 802.11g ESSID:"<censored>"
Mode:Managed Frequency:2.462 GHz Access Point: <censored>
Bit Rate=54 Mb/s Tx-Power=20 dBm
RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
Link Quality:84 Signal level:0 Noise level:171
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:7

Radio off:

eth1 unassociated ESSID:off/any
Mode:Managed Channel=0 Access Point: 00:00:00:00:00:00
Bit Rate=54 Mb/s Tx-Power=off
RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
Link Quality:0 Signal level:0 Noise level:0
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0


--
pa at panix dot com


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