Can't change power management using NM

[Felipe Lema <felipe lema gmail com>]

Hi, everybody

Using opensuse 12.2, I can't get my laptop to boot to xfce desktop with Power Management off on device wlan0 (wireless).

$ /usr/sbin/iwconfig | grep -i "power man"
lo no wireless extensions.

eth0 no wireless extensions.

 Power Management:off

However, I can change power management using iwconfig (grep'ing afterwards confirms that I disabled power management).
# iwconfig wlan0 power off ; echo "return code: $?"
return code: 0

I've tried changing WIRELESS_POWER to 'none' and 'no' in /etc/sysconfig/network/ifcfg-wlan0 but I've had no luck with it

What can/should I do?

Thanks