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[eric aquaronne <1295285@xxxxxxxxxxxxxxxxxx>]

Affects me too, looking for older bugs i found one on 13.03 that looks similar: 
Bug #1184262 
My working bypass is to issue a "sudo killall NetworkManager" after resuming and this works again (trying just to touch the sleep parameter does nt fix the problem)
I use a Lenovo X220 with i5

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https://bugs.launchpad.net/bugs/1295285

Title:
  Wi-Fi or Networking stop working after suspend/resume (failure) Ubuntu
  14.04

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Wifi or network stack stop working, after notebook resumed from suspend. Toggle networking by network applet nothing change.
  Ubuntu 14.04
  Asus zenbook prime ux31a.
  02:00.0 Network controller: Intel Corporation Centrino Advanced-N 6235 (rev 24)

  ProblemType: KernelOops
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-18-generic 3.13.0-18.38
  ProcVersionSignature: Ubuntu 3.13.0-18.38-generic 3.13.6
  Uname: Linux 3.13.0-18-generic x86_64
  Annotation: This occured during a previous suspend and prevented it from resuming properly.
  ApportVersion: 2.13.3-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ur         1978 F.... pulseaudio
  CRDA:
   country RU:
    (2402 - 2482 @ 40), (N/A, 20)
    (5735 - 5835 @ 20), (N/A, 30)
  Date: Thu Mar 20 19:32:32 2014
  ExecutablePath: /usr/share/apport/apportcheckresume
  Failure: suspend/resume
  HibernationDevice: RESUME=UUID=4f2dae9f-e237-4163-86d5-aecc46159037
  InstallationDate: Installed on 2014-03-18 (2 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140317)
  InterpreterPath: /usr/bin/python3.4
  MachineType: ASUSTeK COMPUTER INC. UX31A
  ProcCmdline: /usr/bin/python3 /usr/share/apport/apportcheckresume
  ProcEnviron:
   TERM=linux
   PATH=(custom, no user)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-18-generic.efi.signed root=UUID=5349e06c-59f5-4efa-aa59-87fd57fc0464 ro quiet splash vt.handoff=7
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-18-generic N/A
   linux-backports-modules-3.13.0-18-generic  N/A
   linux-firmware                             1.126
  SourcePackage: linux
  StagingDrivers: rts5139
  Title: [ASUSTeK COMPUTER INC. UX31A] suspend/resume failure
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

  dmi.bios.date: 06/14/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: UX31A.219
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: UX31A
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrUX31A.219:bd06/14/2013:svnASUSTeKCOMPUTERINC.:pnUX31A:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX31A:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.name: UX31A
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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