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[Gumuiyul <1570595@xxxxxxxxxxxxxxxxxx>]

the problem as same for me, 
I have worked good few years 
Until Ubuntu 16.04 daily 20160406 works fine.  the release run on the kernel 4.4.16.
that is, the Wifi has no problem until got 16.04 daily 20160415+later.
My WiFi connection failed mostly since I have upgrade to daily 20160415 + later. 
The network manger dosen't show any WiFi spots around me.
I am using both wired and  wireless lan.  Wired  perfect works.
I desire to get that fixed in the next release.
Thank a lot.

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https://bugs.launchpad.net/bugs/1570595

Title:
  Intel 7265 wifi drops and won't reconnect

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Xenial:
  Confirmed

Bug description:
  My my T450 has Intel 7265 wifi. Sometimes it just seems to disappear
  from network manager. I end up having to rmmod the iwlwifi module and
  re-add it to make it see wireless access points again.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-18-generic 4.4.0-18.34
  ProcVersionSignature: Ubuntu 4.4.0-18.34-generic 4.4.6
  Uname: Linux 4.4.0-18-generic x86_64
  ApportVersion: 2.20.1-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  alan       2224 F.... pulseaudio
   /dev/snd/controlC0:  alan       2224 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Thu Apr 14 21:43:35 2016
  HibernationDevice: RESUME=UUID=f39f9990-20e6-4bbf-b8bf-46316b7b6d42
  InstallationDate: Installed on 2016-04-08 (6 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Beta amd64 (20160407)
  MachineType: LENOVO 20BV001BUK
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-18-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-18-generic N/A
   linux-backports-modules-4.4.0-18-generic  N/A
   linux-firmware                            1.157
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/27/2016
  dmi.bios.vendor: LENOVO
  dmi.bios.version: JBET56WW (1.21 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20BV001BUK
  dmi.board.vendor: LENOVO
  dmi.board.version: 0B98417 WIN
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.modalias: dmi:bvnLENOVO:bvrJBET56WW(1.21):bd01/27/2016:svnLENOVO:pn20BV001BUK:pvrThinkPadT450:rvnLENOVO:rn20BV001BUK:rvr0B98417WIN:cvnLENOVO:ct10:cvrNone:
  dmi.product.name: 20BV001BUK
  dmi.product.version: ThinkPad T450
  dmi.sys.vendor: LENOVO

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