I have installed the Ubuntu Server, and then the desktop.
The wireless card does not activate [no green light] on my Dell Inspiron 6400.
dmseg | grep 3945 shows the card as present BUT /etc/newtorks/interfaces shows nothing about the card.
Threads I have investigated mention something about a kill switch. Being a noob I don't really understand.
Note: the wireless IS enabled from setup and the FN+F2 key can get the bluetooth on, but not the wireless card.
What is the problem?