Ubuntu13.10 lenovo NIC Driver Installation (Broadcom) ubuntu has just released version 13.10 This month. After upgrading the operating system version, it cannot search for wireless hotspots. Drivers downloaded from lenovo's official website are all for windows, therefore, you have to find the linux driver corresponding to the NIC. Run the following Command: Command code sudo apt-get install linux-headers-generic build-essential dkms sudo apt-get update (optional maybe) sudp apt-get install linux-source sudo apt-get install -- reinstall bcmwl-kernel-source sudo modprobe wl sudo dpkg-I should be able to search for wireless hotspots after the wireless-bcm43142-dkms_6.20.55.19-1_amd64.deb is complete, my Wireless Network Card is Broadcom Corporation BCM43142. You can run the lspci command to check that this problem occurs after 12.10, But I didn't install 12.10 and 13.04, so I don't know.