I've had a Linux installed on my Dell XPS laptop for 2 years and it has suddenly stopped recognising any Wifi Networks.

In Settings > Networks the options are:

Network Proxy 

More Info:

$ sudo lshw -C network
  *-network UNCLAIMED     
       description: Network controller
       product: BCM4352 802.11ac Wireless Network Adapter
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:02:00.0
       version: 03
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list
       configuration: latency=0
       resources: memory:f7200000-f7207fff memory:f7000000-f71ffff


Network controller: Broadcom Corporation BCM4352 802.11ac Wireless Network Adapter (rev 03)

$ iwconfig
lo        no wireless extensions.

enp0s20u1c4i2  no wireless extensions.

$ grep -R brcm /etc/modprobe.d
/etc/modprobe.d/blacklist-bcm43.conf:blacklist brcm80211
/etc/modprobe.d/blacklist-bcm43.conf:blacklist brcmfmac
/etc/modprobe.d/blacklist-bcm43.conf:blacklist brcmsmac

Chilli555 - Thanks! Edit uname -r 4.15.0-23-generic

David Foeerster- dpkg-query -Wf '${Status;1} ${Package}\n' linux-* | sed -ne 's/^i //'

Nothing happens

Edit: Elder Geek suggestion:

sudo modprobe wl modprobe: FATAL: Module wl not found in directory /lib/modules/4.15.0-23-generic

  • 2
    Please edit your question to add the result of the terminal command: uname -r Welcome to Ask Ubuntu. – chili555 Jun 22 '18 at 19:43
  • 1
    Could you please edit your question to include the output of dpkg-query -Wf '${Status;1} ${Package}\n' linux-\* | sed -ne 's/^i //'? Thanks. – David Foerster Jun 23 '18 at 9:43
  • Related: askubuntu.com/questions/590442/… – Elder Geek Jun 23 '18 at 19:04
  • Hi, I've updated the question as requested. Thank you for all your help. Issue still not fixed, unfortunately. – XYZAH Jun 24 '18 at 21:51


sudo systemctl restart network-manager

Sometimes WiFi breaks and restarting helps.

|improve this answer|||||
  • Hi, doesn't make any difference. – XYZAH Jun 23 '18 at 22:39

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