I've installed Ubuntu 12.04 Server with lxde installed onto it. My computer is a HP Pavilion ze2000 which happens to have the broadcom wireless card.
[Output]: lspci -nn | grep 14e4
05:02.0 Network controller : Broadcom Corporation BCM4318 [AirForce One 54g] 802.11g Wireless LAN Controller [14e4:4318] (rev 02)
I was eventually able to get the wireless connection working but it does not persist after rebooting. With ethernet cable unplugged:
If I do
sudo ifconfig wlan0 upthen do
sudo /etc/init.d/networking restartit freezes and eventually does not start the network (in this case it seems to be doing the same thing it does during boot).
However, if I do
sudo ifconfig wlan0up, then plug in the ethernet cable, then do
sudo /etc/init.d/networking restartit fires right up and connects to the wireless. In that latter case, it connects to the wireless even though the ethernet cable is still plugged in. Then I can unplug the enthernet cable and still be connected wirelessly (unless I reboot). It looks like all the same modules are loaded both before and after.
Does anyone have some clues where to look for the problem?