Unable to install wifi drivers on Ubuntu 16.04

[Man Parvesh]

Unable to install wifi drivers on Ubuntu 16.04
I have tried various options from the internet but in vain.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-21-generic 4.4.0-21.37 [modified: boot/vmlinuz-4.4.0-21-generic]
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: manparvesh 1609 F.... pulseaudio
 /dev/snd/controlC0: manparvesh 1609 F.... pulseaudio
CurrentDesktop: Unity
Date: Fri Sep 23 17:31:56 2016
HibernationDevice: RESUME=UUID=e32a9c2a-6ee4-477c-a51f-806ca999f29e
InstallationDate: Installed on 2016-09-23 (0 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
IwConfig:
 enx7a2cb569331d no wireless extensions.

 enp7s0 no wireless extensions.

 lo no wireless extensions.
MachineType: Dell Inc. Vostro 3446
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-21-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-21-generic N/A
 linux-backports-modules-4.4.0-21-generic N/A
 linux-firmware 1.157
RfKill:
 0: hci0: Bluetooth
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/03/2015
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A09
dmi.board.name: 06XK30
dmi.board.vendor: Dell Inc.
dmi.board.version: A09
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: Not Specified
dmi.modalias: dmi:bvnDellInc.:bvrA09:bd11/03/2015:svnDellInc.:pnVostro3446:pvrNotSpecified:rvnDellInc.:rn06XK30:rvrA09:cvnDellInc.:ct8:cvrNotSpecified:
dmi.product.name: Vostro 3446
dmi.product.version: Not Specified
dmi.sys.vendor: Dell Inc.

[Brad Figg (brad-figg)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.8 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.8

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]