Hi everyone , i've tried to install Ubuntu 12.10 into my laptop Acer Aspire 5536 and the problem is when i try to connect myself to the network.

All the network seems to be there and when i try to connect it takes a while then it tell me "Connected" , in fact when i do $ifconfig it gaves me no IP address.

I've seen by updating my network manager should help out if I connect it into my eth0.

Why this is happening with version 12.10 when it never occur before?