I have Ubuntu 16.04. I cannot see any wifi enabling option. I have selected the Broadcom driver in software and update, and the Wi-Fi switch is enabled in the BIOS.
I've looked through the help pages and run the following:
$ sudo lshw -C network *-network description: Network controller product: BCM4311 802.11b/g WLAN vendor: Broadcom Corporation physical id: 0 bus info: pci@0000:0b:00.0 version: 01 width: 32 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list configuration: driver=b43-pci-bridge latency=0 resources: irq:16 memory:efdfc000-efdfffff *-network description: Ethernet interface product: BCM4401-B0 100Base-TX vendor: Broadcom Corporation physical id: 0 bus info: pci@0000:03:00.0 logical name: eth0 version: 02 serial: 00:1d:09:b6:10:83 size: 100Mbit/s capacity: 100Mbit/s width: 32 bits clock: 33MHz capabilities: pm bus_master cap_list ethernet physical mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=b44 driverversion=2.0 duplex=full ip=192.168.1.135 latency=64 link=yes multicast=yes port=twisted pair speed=100Mbit/s resources: irq:17 memory:ef9fe000-ef9fffff*What should I do?
$ lspci -knn | grep Net -A3; rfkill list
0b:00.0 Network controller [0280]: Broadcom Limited BCM4311 802.11b/g WLAN [14e4:4311] (rev 01) Subsystem: Dell Wireless 1390 WLAN Mini-Card [1028:0007] Kernel driver in use: b43-pci-bridge Kernel modules: ssb, wl1 Answer
Connect to the internet by wire and run
sudo apt purge bcmwl-kernel-source
sudo apt install firmware-b43-installerand reboot.
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