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Ubuntu 12.04 system freezing when not connected to LAN [closed]

I was able to install 12.04 ok on my Acer eMachines, but whenever it is unplugged from the LAN connection, the whole system freezes. I've installed the latest updates and it's still behaving the same. ...
1
vote
1answer
800 views

My netbook freezes everytime i turn on WLAN on Ubuntu

Everytime i try to use WLAN connection on my netbook (Asus Eepc) my Natty freezes and i'm forced to restart and use my ethernet connection... How can i resolve this? I've an Atheros board.