Turning Tx Power off not working in client mode

[Ram Nayak]

I using the hostap driver as a client and by default the client is not 
associated to any access point.

I then use the command : "iwconfig wlan0 txpower off" to turn off the 
transmitter.

Using a wireless sniffer I see that the probe requests are still being 
transmitted from the card. Why are the probe requests still being 
transmitted?

..Ram

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