[Om2008.9] How to power off Wifi?
Matthias Apitz
guru at unixarea.de
Sat Nov 15 15:06:38 CET 2008
El día Saturday, November 15, 2008 a las 04:13:40AM +0100, "Marco Trevisan (Treviño)" escribió:
> FilipBE wrote:
> > I was able to disable/re-enable wifi with following lines, I did however not
> > have the time to check the impact on battery life....
> >
> > # using Atheros wmiconfig command to disable wlan
> > ./wmiconfig -i eth0 --wlan disable
> >
> >
> > # To re-enable wlan:
> > ./wmiconfig -i eth0 --wlan enable
> > # set re-association mode 0 : do send disassoc when reassociation
> > ./wmiconfig -i eth0 --setreassocmode 0
> > # now try to reconnect wlan using gui
> > iwlist eth0 scan
>
> Thanks they works well for disabling the interface!
> Have you now done some tests about the impact on the battery life?
> Would you suggest to run the "--wlan disable" command on boot too?
>
> Btw I was able to re-associate to my AP only once... :(
I have tested it and '--wlan disable' seems to do something with the
interface (look the output of 'iwconfig' after disable/enable) and the
NIC associates always fine again with my AP;
I don't know if it reduces the drawing of power (btw: what is the
easiest method to measure it? pulling out the battery and measure the
power consumption via the cable?);
the small Wifi icon in the top bar never disappears, which let me think
that '--wlan disable' is pretty much useless in this sense of
power-saving;
HIH
matthias
root at om-gta02:~# iwconfig eth0
eth0 AR6000 802.11g ESSID:""
Mode:Managed Frequency:2.442 GHz Access Point: 00:13:F7:0D:08:48
Bit Rate=54 Mb/s Tx-Power=15 dBm Sensitivity=0/3
Retry:on
Encryption key:off
Power Management:off
Link Quality:206/94 Signal level:-145 dBm Noise level:-96 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
root at om-gta02:~# ./wmiconfig -i eth0 --wlan disable
root at om-gta02:~# iwconfig eth0
eth0 no wireless extensions.
root at om-gta02:~# ./wmiconfig -i eth0 --wlan enable
root at om-gta02:~# iwconfig eth0
eth0 AR6000 802.11g ESSID:""
Mode:Managed Bit Rate:54 Mb/s Tx-Power=15 dBm Sensitivity=0/3
Retry:on
Encryption key:off
Power Management:off
Link Quality:206/94 Signal level:-145 dBm Noise level:-96 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
[ifup]
root at om-gta02:~# netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
192.168.2.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 usb0
0.0.0.0 192.168.2.1 0.0.0.0 UG 0 0 0 eth0
root at om-gta02:~# ping 192.168.2.1
PING 192.168.2.1 (192.168.2.1): 56 data bytes
64 bytes from 192.168.2.1: seq=0 ttl=64 time=156.209 ms
64 bytes from 192.168.2.1: seq=1 ttl=64 time=60.389 ms
[ifdown]
root at om-gta02:~# ./wmiconfig -i eth0 --wlan disable
root at om-gta02:~# iwconfig eth0
eth0 no wireless extensions.
root at om-gta02:~# ./wmiconfig -i eth0 --wlan enable
[ifup]
root at om-gta02:~# ping 192.168.2.1
PING 192.168.2.1 (192.168.2.1): 56 data bytes
64 bytes from 192.168.2.1: seq=0 ttl=64 time=136.065 ms
64 bytes from 192.168.2.1: seq=1 ttl=64 time=55.010 ms
64 bytes from 192.168.2.1: seq=2 ttl=64 time=75.845 ms
--
Matthias Apitz
Manager Technical Support - OCLC GmbH
Gruenwalder Weg 28g - 82041 Oberhaching - Germany
t +49-89-61308 351 - f +49-89-61308 399 - m +49-170-4527211
e <matthias.apitz at oclc.org> - w http://www.oclc.org/ http://www.UnixArea.de/
b http://gurucubano.blogspot.com/
A computer is like an air conditioner, it stops working when you open Windows
Una computadora es como aire acondicionado, deja de funcionar si abres Windows
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