Comment 7 for bug 138922

Same here. Same logs. Same stuck situation : modprobe -r iwl3945 && modprobe iwl3945 , ifconfig eth1 down && ifconfig eth1 up won't do anything. I have no clue to resolve this situation apart from rebooting ubuntu.

This happens randomly after several minutes of good working connection.

network-manager is 0.6.6-0ubuntu5 in a up-to-date hardy heron.

Client wifi host is a Q35 from samsung ( 3945ABG Wireless from Intel) which uses the iwl3945 module.

Wifi router is "livebox" from Orange (SAGEM v1.1), which is the first network provider in France.
The internal configuration of the router is the default configuration as it is set when you receive the box from the provider.
(default is a WEP config)