Does the bug go away if you boot into the previous kernel version?

** Changed in: linux-lts-vivid (Ubuntu)
       Status: New => Triaged

** Changed in: linux-lts-vivid (Ubuntu)
   Importance: Undecided => Medium

** Also affects: linux (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu)
       Status: New => Triaged

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

** Tags added: kernel-da-key

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https://bugs.launchpad.net/bugs/1659614

Title:
  [Lenovo M700z] Wifi malfunctions after updating system

Status in linux package in Ubuntu:
  Triaged
Status in linux-lts-vivid package in Ubuntu:
  Triaged

Bug description:
  Lenovo M700z (CID 201601-20436) with its pre-installed image.

  [Steps To Reproduce]
  Enable the proposed pocket, and then update the system by 'sudo apt-get 
dist-upgrade'

  [Expected Result]
  Wifi works

  [Actual Result]
  Wifi malfunctions. The network indicator does not show any wireless AP.

  --------

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.19.0-80-generic 3.19.0-80.88~14.04.1
  ProcVersionSignature: Ubuntu 3.19.0-80.88~14.04.1-generic 3.19.8-ckt22
  Uname: Linux 3.19.0-80-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.23
  Architecture: amd64
  Date: Fri Jan 27 01:28:34 2017
  DistributionChannelDescriptor:
   # This is a distribution channel descriptor
   # For more information see 
http://wiki.ubuntu.com/DistributionChannelDescriptor
   canonical-oem-sutton-m700z-trusty-amd64-20160314-0
  InstallationDate: Installed on 2017-01-25 (1 days ago)
  InstallationMedia: Ubuntu 14.04 "Trusty" - Failed to find casper uuid.conf in 
'binary/casper/initrd.img-3.19.0-37-generic.old-dkms' LIVE Binary 20160314-09:31
  SourcePackage: linux-lts-vivid
  UpgradeStatus: No upgrade log present (probably fresh install)

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