Re: Notebook Hardware Key for Wireless LAN

[Sergey Vlasov <vsu@altlinux.ru>]

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On Fri, 07 Oct 2005 19:31:47 +0200 Marcus Woletz wrote:

> Greg KH schrieb:
> [...]
> >>The Button in the notebook case that turns on and off
> >>the WLAN interface. In the Samsung X20 it seems that the
> >>button turns the interface on and off without interaction
> >>with the OS.
> > 
> > Then there's no way that Linux can generate an event based on it.  Most
> > likely it's just a hardware switch to the network device, my laptop has
> > the same thing.
> 
> But the hotplug system is definitly calling the hotplug firmware agent
> when the WLAN interface is turned on the first time. And there are some
> firmware events generated. So I think that the hotplug system sees that
> the interface is switched on. The only problem is that these events are
> generated only one time and there's no event when switching off WLAN.

For ipw2200 you can try to poll the "rf_kill" attribute in sysfs:

	/* 0 - RF kill not enabled
	   1 - SW based RF kill active (sysfs)
	   2 - HW based RF kill active
	   3 - Both HW and SW baed RF kill active */

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