iwlwifi 3945: secondary interface disallows association

iwlwifi 3945: secondary interface disallows association

[Andy Green]

Hi folks -

I have pretty decent functionality on the 3945abg laptop with the Fedora
development kernel version of iwlwifi and WPA via wpa_supplicant.
Connections can stay up over a couple of days or more when I am staying
close to the AP.

However if I perform this action:

echo -n mon0 > /sys/class/ieee80211/phy0/add_iface

I immediately lose association and cannot reacquire it until I remove
the iwl3945 module and insert again.  I don't have to do anything with
the new interface, just create it.  I tried setting the channel and mode
of it, but that didn't help with reacquiring an association.

In contrast I can bring up other virtual interfaces okay on, eg, zd1211
without losing an existing association to the same WPA network.

-Andy

Re: iwlwifi 3945: secondary interface disallows association

[ian]

I don't appear to have the same problem with:
  -latest version of iwlwifi (0.0.35)
  - gentoo-sources-2.6.20 kernel (patched with a relatively old mac80211 package)

I believe fedora has 0.0.24 of iwlwifi embedded?
So the problem might have been fixed already.

Writing this email, after executing your command, when associated on a wpa2
network.

Ian.

Andy Green wrote:
> Hi folks -
> 
> I have pretty decent functionality on the 3945abg laptop with the Fedora
> development kernel version of iwlwifi and WPA via wpa_supplicant.
> Connections can stay up over a couple of days or more when I am staying
> close to the AP.
> 
> However if I perform this action:
> 
> echo -n mon0 > /sys/class/ieee80211/phy0/add_iface
> 
> I immediately lose association and cannot reacquire it until I remove
> the iwl3945 module and insert again.  I don't have to do anything with
> the new interface, just create it.  I tried setting the channel and mode
> of it, but that didn't help with reacquiring an association.
> 
> In contrast I can bring up other virtual interfaces okay on, eg, zd1211
> without losing an existing association to the same WPA network.
> 
> -Andy
> -
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> 

Re: iwlwifi 3945: secondary interface disallows association

[Andy Green]

ian wrote:

> I don't appear to have the same problem with:
>  -latest version of iwlwifi (0.0.35)
>  - gentoo-sources-2.6.20 kernel (patched with a relatively old mac80211
> package)
> 
> I believe fedora has 0.0.24 of iwlwifi embedded?

I don't know, this was yesterday's latest development kernel
2.6.22-0.5.rc7.git2.fc8 FWIW.

> So the problem might have been fixed already.

You're right Ian, I tested current wireless-dev git iwl3945 on another
laptop and it works correctly, I can even put the secondary interface
into Monitor mode and see stuff flying around and still ping things frmo
the default associated interface.  Great!

-Andy