[Cbe-oss-dev] Diagnosing NetworkManager/ps3_gelic connection issues in Ubuntu Jaunty

[Dan Munckton]

Hi Mokuno-san

On Thu, 2009-03-05 at 18:13 +0900, Masakazu Mokuno wrote:
> Hi Dan,
> 
> Sorry for late reply.  I've not subscribed this list in these days. 

No problem at all, you're reply is right on time for me! :)

> 
> > The problem we're experiencing now is failure to connect to a wireless
> > network if the wired interface has already been connected.
> > 
> > The most obvious possible cause would be because both interfaces have
> > the same MAC address and both are connecting to the same network segment
> > (e.g. basic home wifi/ethernet router). Because the system brings up
> > eth0 first at boot and wlan0 on user login, eth0 beats wlan0 to the
> > connection.
> > 
> > Although I have a working knowledge of networking, and this explanation
> > makes sense to me, I want to be sure the symptoms are definitely due to
> > this before moving on. In the log below it appears the gelic wireless
> > driver is doing all the right things but it's just not getting the right
> > results from the hardware/hypervisor.
> > 
> > Can anyone confirm this?
> 
> Yes, PS3 shares the MAC address for both wired ethernet and wireless. 
> If both are connected to the same segment, the network will be unstable
> at least.  As far as I experienced, the wireless connection itself kept
> 'associated' even with using the same segment though.

Yes. Network instability was what I was sort of expecting to see too,
rather than just failure to associate.

> 
> Could you please try the followings and see if the wireless connection
> will succeed if you could:
> 
>  o Use separate ethernet segments for wired and wireless; unplug the
>  ethernet cable or using standalone wireless APs etc...
>  
>  o See what will happen if disable NM and use wpa_supplicant only
>  
>  o Disable MAC address filtering feature on your AP if it has
> 
> The attached patch lets the driver emit more verbose messages to help
> analyzing what happens in the driver.  Could you please try to reproduce
> the symptom with the patch and send me the dmesg log?

Ok, I'll endeavour to work on it this weekend, and get back to you next
week.

Thanks.

Dan