First off, let me start by saying that I am well aware that many other people have asked similar questions, and have had their questions answered and their problems solved. I am here because I have attempted a range of the solutions already posted, and none of them have worked.
Some background: I am running Ubuntu 16.04 off of a flash drive. The WiFi does not work. But, it's not just that I try to connect to a network, and it doesn't connect; rather, the idea of WiFi itself seems to be a foreign concept to the system. Nowhere is there any option to even see available WiFi networks. Clicking on the network icon yields: (parentheses indicate grayed-out):
(Ethernet network) (disconnected) VPN Connections→ Enable Networking – this is checked (Connection information) Edit connections
If I run
service network-manager restart, which some guides say will fix the wifi menu, I get a notification that I am now disconnected, and more options become grayed out. I've also tried typing
nm-applet in terminal and that did nothing.
One post suggested running
sudo ifconfig wlp4s0 up. This did nothing, and gave the message:
wlp4s0: ERROR while getting interface flags: no such device.
sudo modprobe -wl yields:
Error: Could not insert wl: required key not available. Researching that, it seems that the error comes from having secure boot enabled. So I go into the BIOS, disable secure boot, and then run the command again, and get the same result.
After disabling secure boot, I then tried running
sudo apt-get purge bcmwl-kernel-source then
sudo apt-get install linux-generic bcmwl-kernel-source, rebooted, and there was no effect.
My wifi card is Broadcom BCM4312 802.11b/g/n and my PCI Id is 14e4:4365 (rev 01). This information in hand, I followed the instructions of another post, which suggested I go to
/etc/pm/config and edit
SUSPEND_MODULES="BCM4312". There was no
config.d file in that directory, and I was told I did not have permission to save a file there, which makes no sense because I am the only user.
I've gone into Settings > Software and Updates, and enable the Broadcom wifi card.
lo no wireless extensions enp14s0 no wireless extensions
I'm not sure what that means.
I've tried all the steps at the following posts:
- Can't view Wifi networks after upgrading to Ubuntu 16.04
- 16.04 LTS wifi connection issues
- Installing Broadcom Wireless Drivers
And non of them seem to work. I am not sure where to go from here. Any help would be greatly appreciated. Thank you.