Wireless silently disconnects?

[Antony J Mee <A J Mee ncl ac uk>]

Hello all,

I've had an issue with NM for over a month and hoped it might just be a 
quirk that would go
away in time. (I'm running NM from CVS).

When NM connects to an AP is associates correctly, then DHCp runs and 
gets me and IP etc.
The routes are correctly set and everything seems to be working 
correctly.  All the output
from "NetworkManager --no-daemon", nm-applet etc. looks just fine.  I 
start a web browser
for example and start browsing the web (making sure to look at something 
that isn't cached!)
perhaps an ssh connection to somewhere. It all works.  Yay!

A minute or so later (hard to put an exact time on it).  I try the same 
actions.  Nothing works
I get "destination host unreachable" typed messages for every service 
(ping, ssh, http, dns etc.)
ie. the link appears to have gone down.  ifconfig info hasn't changed. 
iwconfig info hasn't changed.
route information hasn't changed. there has been no output from 
NetworkManager and nm-applet
still shows the same state.  I've looked in every log I can think and 
can see nothing. 

Wired works just fine though.

Anyone else seen this? Any suggestions?

I have a BCM4306 card using the Ndiswrapper driver. I'm running a Gentoo 
system and
wpa_supplicant works for both open networks and WPA Personal when used 
directly ie. via
init.d scripts.

tOnY