I just installed Ubuntu 16.04 on my Lenovo notebook with a Broadcom network device. My wifi isn't working. I tried to activate a private driver, but that didn't work.
03:00.0 Network controller [0280]: Broadcom Corporation Device [14e4:43ae] (rev 02)
It sounds like you may need to install drivers for your wireless card.
First, can you please go into the terminal and type
lspci -nn -d 14e4:
and tell me what it returns to you?
Also run this: iwconfig after and post the results, too.
Reference: Installing Broadcom Wireless Drivers
EDIT:
It appears that this wifi card is not yet supported according to other users and its not listed in the package install table in the previous link.
