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[Stéphane Graber <stgraber@xxxxxxxxxxxx>]

I unfortunately can't reproduce this on demand. I've had it happen to me
so far twice, both times immediately after resume, on two completely
different wifi networks, once on a mobile hotspot from my phone and
another time at a hotel in Brussels.

My best guess is that it's got to do with some network state at suspend
time which then causes breakage on resume.

If I do find some kind of pattern that I can use to even vaguely
reproduce this thing on request, then I'll definitely send you a trace.

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https://bugs.launchpad.net/bugs/1539080

Title:
  Intel wifi broken after resume

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  After resume, wifi doesn't come back up, all wifi related commands
  take a long time before failing with input/output error.

  Kernel log only seems to show some slowpaths being hit, but wifi sure
  isn't working here...

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.3.0-7-generic 4.3.0-7.18
  ProcVersionSignature: Ubuntu 4.3.0-7.18-generic 4.3.3
  Uname: Linux 4.3.0-7-generic x86_64
  NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
  ApportVersion: 2.19.4-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  stgraber   2746 F.... pulseaudio
   /dev/snd/controlC0:  stgraber   2746 F.... pulseaudio
  Date: Thu Jan 28 14:37:03 2016
  InstallationDate: Installed on 2015-04-23 (279 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  MachineType: LENOVO 20BXCTO1WW
  ProcEnviron:
   LANGUAGE=en_CA:en
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_CA.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.3.0-7-generic.efi.signed root=UUID=2a5a25ae-6bd9-40e1-8554-c38e0883a462 ro quiet splash swapaccount=1 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-4.3.0-7-generic N/A
   linux-backports-modules-4.3.0-7-generic  N/A
   linux-firmware                           1.155
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 03/10/2015
  dmi.bios.vendor: LENOVO
  dmi.bios.version: JBET47WW (1.12 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20BXCTO1WW
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0E50512 STD
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.modalias: dmi:bvnLENOVO:bvrJBET47WW(1.12):bd03/10/2015:svnLENOVO:pn20BXCTO1WW:pvrThinkPadT450s:rvnLENOVO:rn20BXCTO1WW:rvrSDK0E50512STD:cvnLENOVO:ct10:cvrNone:
  dmi.product.name: 20BXCTO1WW
  dmi.product.version: ThinkPad T450s
  dmi.sys.vendor: LENOVO

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