No, this problem exists since the clean install I did for Ubuntu 16.04.1
(I'm using elementary OS Loki stable), WiFi support was missing out-of-
the-box, as I mentioned in the link I provided in my comment #1, upon
searching for Linux support for this Intel Adapter, I found this page
https://wireless.wiki.kernel.org/en/users/drivers/iwlwifi which says
that support for IntelĀ® Wireless 3168 (the WiFi+Bluetooth adapter I have
in laptop) was added starting Kernel 4.6.

So chances are that 4.4.x may never support it until either 1) someone
back-ports the firmware to 4.4 or 2) Ubuntu 16.04.2 (with Kernel 4.8)
releases.

I filed this bug to track if someone is back-porting hardware support
from newer kernels. Also to summarize, I did test following:

1) With stock Kernel 4.4, only Bluetooth works, WiFi is undetected.
2) With Kernel 4.6.x from Mainline, Nothing works, both WiFi and Bluetooth 
remain undetected.
3) With Kernel 4.7.x from Mainline, WiFi works but Bluetooth is undetected.
4) With Kernel 4.8 from Mainline, both are working just fine!

Right now, I'm stuck with Kernel 4.8 (stable release) at the cost of
battery life.

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https://bugs.launchpad.net/bugs/1627114

Title:
  WiFi is not detected for Intel Dual BandWireless-AC 3168

Status in linux package in Ubuntu:
  Triaged

Bug description:
  I have HP Pavilion 15 AU113TX laptop, which comes with Intel Core i5
  7200U Kaby Lake processor and uses Intel Dual BandWireless-AC 3168
  WiFi + Bluetooth Combo adapter, I have installed Ubuntu GNOME 16.04.1
  on it, and it is unable to detect WiFi adapter.

  Upon running "lspci -nnk | grep -A2", I'm getting following
  information about adapter.

  028005:00.0 Network controller [0280]: Intel Corporation Device [8086:24fb] 
(rev 10)
          DeviceName: Intel Dual BandWireless-AC 3168 802.11 ac 1x1 WiFi + BT 
4.0 Combo Adapter
          Subsystem: Intel Corporation Device [8086:2110]

  But running "rfkill list all", I see following output (WiFi missing
  there).

  0: hci0: Bluetooth
          Soft blocked: no
          Hard blocked: no

  And here's the output for "dmesg | grep iwl"

  [   13.570633] iwlwifi 0000:05:00.0: Unsupported splx structure
  [   13.635662] iwlwifi 0000:05:00.0: Direct firmware load for 
iwlwifi-3168-21.ucode failed with error -2
  [   13.650761] iwlwifi 0000:05:00.0: Direct firmware load for 
iwlwifi-3168-20.ucode failed with error -2
  [   13.650765] iwlwifi 0000:05:00.0: no suitable firmware found!

  Output for "ls -al /lib/firmware | grep 3168" Under both Stock Kernel
  4.4.0-36.

  -rw-r--r--  1 root root   33168 Jul 13 01:03 hfi1_pcie.fw
  --- 
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', 
'/dev/snd/timer'] failed with exit code 1:
  CurrentDesktop: Pantheon
  DistroRelease: elementary 0.4
  InstallationDate: Installed on 2016-09-21 (2 days ago)
  InstallationMedia: elementary OS 0.4 "Loki" - Stable amd64 (20160909)
  IwConfig:
   lo        no wireless extensions.
   
   eno1      no wireless extensions.
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 8087:0aa7 Intel Corp. 
   Bus 001 Device 002: ID 1bcf:2c87 Sunplus Innovation Technology Inc. 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: HP HP Pavilion Notebook
  NonfreeKernelModules: wl
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-38-generic 
root=UUID=38aa8628-4aa2-48e4-92bd-6cd3b33b0770 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 4.4.0-38.57-generic 4.4.19
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-38-generic N/A
   linux-backports-modules-4.4.0-38-generic  N/A
   linux-firmware                            1.161
  RfKill:
   0: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no
  Tags:  loki
  Uname: Linux 4.4.0-38-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 07/19/2016
  dmi.bios.vendor: Insyde
  dmi.bios.version: F.14
  dmi.board.asset.tag: Type2 - Board Asset Tag
  dmi.board.name: 8216
  dmi.board.vendor: HP
  dmi.board.version: 83.13
  dmi.chassis.type: 10
  dmi.chassis.vendor: HP
  dmi.chassis.version: Chassis Version
  dmi.modalias: 
dmi:bvnInsyde:bvrF.14:bd07/19/2016:svnHP:pnHPPavilionNotebook:pvrType1ProductConfigId:rvnHP:rn8216:rvr83.13:cvnHP:ct10:cvrChassisVersion:
  dmi.product.name: HP Pavilion Notebook
  dmi.product.version: Type1ProductConfigId
  dmi.sys.vendor: HP

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