Re: [ipw3945-devel] [BUG] iwlwifi 3945 works only with disable_hw_scan=1

[Maxim Levitsky <maximlevitsky@gmail.com>]

Maxim Levitsky wrote:
> Zhu Yi wrote:
>> On Wed, 2008-06-11 at 18:47 +0300, Maxim Levitsky wrote:
>>> I found why I can't reenable wireless with wireless button.
>>>
>>> It turns out that iwlwifi doesn't enable the wireless function after a
>>> R/F kill switch was enabled ether by the button or explicitly.
>>>
>>> I bisected this to commit 5a66926aa9230810704fd5a127966215fd58881e
>>> in linus tree.
>>
>> The card will receive an interrupt when you disable the rf kill switch
>> anyway whatever the wireless function is enabled or not. So the driver
>> will enable the wireless function again. Please check if the interface
>> (wlan0) is up when you disable the rf kill switch later. If it is not,
>> you have to bring it up manually (i.e. ifconfig wlan0 up) to enable the
>> wireless function. Otherwise please provide the dmesg with
>> debug=0x20000.
>>
>> Thanks,
>> -yi
>>
> 
> Why didn't I thought about this before...
> This is exactly what happens, so this isn't a bug.
> 
> What happens is the Network manager brings wlan0 down is it detects that
> there is no link, but this now removes the firmware.
> 
> I guess that the right solution is to listen to the wireless button (via 
> input layer), and turn card on manually.
> 
> If I remember correctly there is something like that in kernel, I try to 
> enable this.
> 
> Otherwise this can be implemented in userspace.
> 
> Best regards,
>     Maxim Levitsky

Nope 3945 doesn't support rfkill via new rfkill subsystem.