I have a big problem.
I have just installed Ubuntu 19.04 on my computer (or laptop or notebook). But, the wireless driver isn't working. I have checked the settings, but there is no menu named "Wi-Fi".
Notebook model: Acer Aspire E 11
This is the complete report:
$ lspci -vnn | grep Network
02:00.0 Network controller [0280]: Broadcom Inc. and subsidiaries BCM43142 802.11b/g/n [14e4:4365] (rev 01)
$ rfkill list all
0: acer-wireless: Wireless LAN
Soft blocked: no
Hard blocked: no
1: acer-bluetooth: Bluetooth
Soft blocked: no
Hard blocked: no
2: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
$ iwconfig
lo no wireless extensions.
enp3s0 no wireless extensions.
$ sudo apt search bcmwl-kernel-source
[sudo] password for juan:
Sorting... Done
Full Text Search... Done
bcmwl-kernel-source/now 6.30.223.271+bdcom-0ubuntu4 amd64 [installed,local]
Broadcom 802.11 Linux STA Wireless driver source
$ uname -r
5.0.0-13-generic
$ sudo modprobe wl
modprobe: FATAL: Module wl not found in directory /lib/module/5.0.0-13-generic
EDIT:
After I reinstall bcmwl-kernel-source. It's most done. But, I get this following message:
modprobe: ERROR: could not insert 'wl': operation not permitted
sudo modprobe wl
I suspect Secure Boot.sudo apt install --reinstall bcmwl-kernel-source
You will need to disable Secure Boot if it is present on your BIOS/EFI.