wireless giving trouble in Ubuntu recently

[H.S.]

Eric Lemoine wrote:
> On 10/18/06, H.S. <hs.samix at gmail.com> wrote:
> 
>>Hello,
>>
>>I have noticed that in the last few days, I am not able to connect via
>>the Networking GUI to my home wireless network. This on a Dell Inspiron
>>5160 laptop using bcm43xx kernel module on a 2.6.15 kernel. Is there
>>something wrong in the networking GUI package or some related packages?
>>  The laptop has a broadcom 1350 mini pci card:
>>  {~}> lspci | grep -i ethernet 0000:02:01.0 Ethernet controller:
>>Broadcom Corporation BCM4401-B0 100Base-TX (rev 02)
>>
>>If I give a new essid and a wep key in the Networking GUI and try to
>>connect, I notice that the entries in /etc/network/interfaces are not
>>immediately updates.
>>
>>Comments about this are welcome.
> 
> 
> Just a question : does it work if you manually configure
> /etc/network/interfaces or is the problem lying somewhere else?
> 

I just tried manually as well, using iwconfig command to set the essid, 
the key and also the access point without success.

BTW, I am using a D-Link DWL-G520 in master mode in another PC on my 
home lan. Thus that PC is a wireless router. If I use tcpdump on that pc 
to listen on the wireless device when I am trying to get a dhcp address 
from that machine on the laptop running Ubuntu, I see no traffic at all.

Also, a Mac laptop and the same laptop in Windows (which dual boots with 
Ubuntu) works okay.

It is only Ubuntu that the problem seems to be in.

->HS