wireless hot key not work after kernel 4.4.0

[Alex Tu]

Machine: COL2-DVT2-CO3 (201603-20970)
BIOS:1.0.0
IMAGE:dell-bto-trusty-magellan-ii-xfr-X34-iso-20160411-0.iso

steps:
 1. press wireless key => confirm it works after flash installation (kernel 3.19.0).
 2. execute "software updater" to install all package until kernel 4.4.0 be installed.
 3. reboot
 4. press wireless key => not work.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-4.4.0-131-generic 4.4.0-131.157~14.04.1
ProcVersionSignature: Ubuntu 4.4.0-131.157~14.04.1-generic 4.4.134
Uname: Linux 4.4.0-131-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.29
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Aug 6 18:14:06 2018
DistributionChannelDescriptor:
 # This is a distribution channel descriptor
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-somerville-trusty-amd64-osp1-20150721-1
InstallationDate: Installed on 2018-08-06 (0 days ago)
InstallationMedia: Ubuntu 14.04 "Trusty" - Build amd64 LIVE Binary 20150721-23:28
SourcePackage: linux-lts-xenial
UpgradeStatus: No upgrade log present (probably fresh install)