On my Lenovo Edge-15 running
18.04.5 with kernel
4.15.0-122-generic. Secure Boot was disabled all along.
I just noticed one day on boot that the Wi-Fi wasn't working. When I went to the Wi-Fi settings I got "No Wi-Fi adapter found". Could an automatic update have turned something off/broken something?
$ sudo lshw -class network *-network UNCLAIMED description: Network controller product: BCM4360 802.11ac Wireless Network Adapter vendor: Broadcom Inc. and subsidiaries 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:d1100000-d1107fff
$ lspci -vnn | grep Network 02:00.0 Network controller : Broadcom Inc. and subsidiaries BCM4360 802.11ac Wireless Network Adapter [14e4:4360] (rev 03) Subsystem: Broadcom Inc. and subsidiaries BCM4360 802.11ac Wireless Network Adapter [14e4:4360]
$ iwconfig vmnet8 no wireless extensions. docker0 no wireless extensions. lo no wireless extensions. enp3s0 no wireless extensions. vmnet1 no wireless extensions.
Is Wi-Fi blocked?
$ rfkill list all 0: ideapad_bluetooth: Bluetooth Soft blocked: no Hard blocked: no 1: hci0: Bluetooth Soft blocked: yes Hard blocked: no
Continuing working through Installing Broadcom Wireless Drivers.
$ sudo apt list bcmwl-kernel-source Listing... Done bcmwl-kernel-source/bionic-updates,now 188.8.131.521+bdcom-0ubuntu5~18.04.1 amd64 [installed]
Purging that per the instructions. Restarted and still no Wi-Fi.
$ sudo update-pciids Downloaded daily snapshot dated 2020-10-11 03:15:01
Per the table, for
14e4:4360 I need to install
$ sudo apt install firmware-b43-installer Reading package lists... Done Building dependency tree Reading state information... Done The following additional packages will be installed: b43-fwcutter The following NEW packages will be installed: b43-fwcutter firmware-b43-installer
Rebooting and still no Wi-Fi.
sudo modprobe -r b43 sudo modprobe b43 sudo rfkill unblock all
After a comment from chili555
$ sudo modprobe wl modprobe: FATAL: Module wl not found in directory /lib/modules/4.15.0-122-generic
A quick search of the output suggests this answer https://askubuntu.com/a/811015/334823
$ sudo apt-get install --reinstall linux-headers-generic Reading package lists... Done Building dependency tree Reading state information... Done 0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 2 not upgraded. Need to get 2,544 B of archives. After this operation, 0 B of additional disk space will be used. Get:1 http://us.archive.ubuntu.com/ubuntu bionic-updates/main amd64 linux-headers-generic amd64 184.108.40.206.109 [2,544 B] Fetched 2,544 B in 0s (28.8 kB/s) (Reading database ... 442641 files and directories currently installed.) Preparing to unpack .../linux-headers-generic_220.127.116.11.109_amd64.deb ... Unpacking linux-headers-generic (18.104.22.168.109) over (22.214.171.124.109) ... Setting up linux-headers-generic (126.96.36.199.109) ... $ sudo modprobe wl modprobe: FATAL: Module wl not found in directory /lib/modules/4.15.0-122-generic
$ sudo apt install --reinstall bcmwl-kernel-source and it got rid of the error from
sudo modprobe wl (which now returns nothing). But still no Wi-Fi.
dmesg | grep wl [ 52.474364] wl: loading out-of-tree module taints kernel. [ 52.474369] wl: module license 'MIXED/Proprietary' taints kernel. [ 52.478450] wl: module verification failed: signature and/or required key missing - tainting kernel [ 52.481565] wl driver 188.8.131.521 (r587334) failed with code 1 [ 52.481568] ERROR @wl_cfg80211_detach : [ 52.481569] NULL ndev->ieee80211ptr, unable to deref wl1
After searching that 2nd line of output I found https://askubuntu.com/a/261934/334823, which I tried, but no change so reverted.