Wireless works, but no route to host

[oneman]

Hi All,



I have Ubuntu 8.04 Hardy amd64 installed on a HP Compaq 6910p. It has  
a wireless controller that shows up in lspci like 'Broadcom  
Corporation BCM4312 802.11a/b/g (rev 02)'. I installed and activated  
the non-free driver and it can establish a connection with my  
wireless AP (an airport extreme, in bridged mode), gets an ip ,  
gateway etc. through DHCP.

After that however it doesn't function.
- I can't ping hosts or reach the internet.
- It's not a DNS problem since using IP's to reach hosts doesn't work  
either.
- I can see some traffic going in and out in the Networktool
- when I switch to wired networking, connected to the same AP, it  
works fine.


I'm not sure where to look. Googleing didn't result in anything  
usefull. Any advice on where to look?


Thx,


Peter