I have installed Ubuntu 16.04 on my laptop. I cannot see Enable wifi option in the network menu. The network controller is unclaimed
*-network UNCLAIMED
description: Network controller
product: Realtek Semiconductor Co., Ltd.
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:03:00.0
version: 00
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: latency=0
resources: ioport:3000(size=256) memory:b1000000-b100ffff
lspci -knn | grep Net -A3; rfkill list
03:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. Device [10ec:d723]
DeviceName: Hanksville Gbe Lan Connection
Subsystem: Hewlett-Packard Company Device [103c:8319]
Kernel modules: wl
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
lspci -knn | grep Net -A3; rfkill list
terminal command. – Pilot6 Sep 08 '17 at 11:20