My Ubuntu version 14.04 suddenly stopped discovering my comcast wireless router. I can see other routers. I can also connect to it by "Connect to a Hidden WIFI Network..".

Is this a router configuration issue?

Below is the ubuntu release and wireless hardware information.

cat /etc/lsb-release

add wireless hardware
##### lspci #####

06:00.0 Network controller [0280]: Broadcom Corporation BCM4311 802.11b/g WLAN [14e4:4311] (rev 01)
Subsystem: Hewlett-Packard Company BCM4311 802.11b/g Wireless LAN Controller [103c:1363]
Kernel driver in use: b43-pci-bridge
  • further steps.. ran "sudo apt-get update" and "sudo apt-get install linux-firmware-nonfree". no change
    – user313783
    Aug 8, 2014 at 19:37
  • Well, you said it yourself that you can connect to a hidden network, right? So it's definitely the router settings Aug 8, 2014 at 20:03
  • Thanks for the reply. I checked the router configuration and the "Broadcast Network Name (SSID)" is enabled and I can see the router on many other devices (phones, WII, in fact another ubuntu machine with the exact same version of the os but different wireless card (Qualcomm Atheros AR242x / AR542x Wireless Network Adapter (PCI-Express) (rev 01)). I think something is broke in the driver.
    – user313783
    Aug 8, 2014 at 20:45
  • I should have also noted I'm still using the b43-pci-bridge kernel driver. I'm not sure how to replace it with the linux-firmware-nonfree install.
    – user313783
    Aug 8, 2014 at 20:48

1 Answer 1


I would try the tutorial here:


Follow the instructions for your 4311. I have the 4318 and that page got mine working just fine.

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