[opensuse] WLAN on battery

Hi, When I power on IBM ThinkPad R52 with AC power connected WLAN is always activated. But when I power on notebook only with battery, WLAN is never activated and I can't activate it on any software way I tried. It is not up to some BIOS option because Windows on the same machine always activate WLAN, with or without AC power. I suppose that is up to kernel power management control during boot, but I don't know where to set up to get WLAN always automaticaly activated (or, at least, to be able to manualy activate). Where should I look to configure such thing? I have OpenSUSE 9.3 on this notebook. Thanks for any help or direction. -- Ivan Guštin, ivan@elin.hr, (098) 366346 ELIN, www.elin.hr, (052) 623491