iwconfig doens't work.

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https://bbs.archlinux.org – Does your wireless device support this feature?  Not every feature that is offered as a setting by iwconfig will work for every device.  I have a crappy realtek card that I no longer use, and it did not support power_save by iwconfig.  But it was able to be set when the module was loaded through a kernel parameter.I see you are trying to use wlan1, which you mention is a usb device.  You should know a couple things.  First, if you use the wlan* kernel names, it won't always be that the USB is 1 and the internal is 0 (unless you plug the USB in after the machine is (HowTos)