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["michael@xxxxxxxxxxxx" <michael@xxxxxxxxxxxx>]

OK, after 3 days, even the most recent firmware still has this bug:
/lib/firmware/iwlwifi-7265D-21.ucode

I'm switching back to the 15.10 firmware which did NOT have this bug and
we'll see if it still crashes: /lib/firmware/iwlwifi-7265D-12.ucode

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https://bugs.launchpad.net/bugs/1577957

Title:
  Intel 7265D wifi firmware crashes on a Lenovo x1 carbon (3rd
  generation)

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  The stock firmware for this device /lib/firmware/iwlwifi-
  7265D-16.ucode is crashing.

  Downloading the latest firmware (/lib/firmware/iwlwifi-7265D-21.ucode)
  isn't supported by the existing iwlwifi driver, and so the driver
  likely needs to be upgraded (or downgraded as well
  (https://git.kernel.org/cgit/linux/kernel/git/iwlwifi/backport-
  iwlwifi.git/?h=release/LinuxCore18).

  I can also confirm that wifi *did* work successfully on 15.10 before
  upgrading to 16.04, although the kernel module required frequent
  restarts due to this bug:
  https://bugs.launchpad.net/ubuntu/xenial/+source/linux/+bug/1570595

  
  A detailed message about the firmware crash is located in the attachment from dmesg output.

  Thanks.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-21-generic 4.4.0-21.37
  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/pcmC1D0p:   mrhines    2419 F...m pulseaudio
   /dev/snd/controlC1:  mrhines    2419 F.... pulseaudio
   /dev/snd/controlC0:  mrhines    2419 F.... pulseaudio
  CurrentDesktop: KDE
  Date: Tue May  3 16:50:50 2016
  HibernationDevice: RESUME=UUID=1ac1f16c-161d-45c7-83b9-cecbbfdeee42
  InstallationDate: Installed on 2016-01-05 (119 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
  MachineType: LENOVO 20BSCTO1WW
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  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
  SourcePackage: linux
  UpgradeStatus: Upgraded to xenial on 2016-04-21 (12 days ago)
  dmi.bios.date: 08/13/2015
  dmi.bios.vendor: LENOVO
  dmi.bios.version: N14ET32W (1.10 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20BSCTO1WW
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0J40709 WIN
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.modalias: dmi:bvnLENOVO:bvrN14ET32W(1.10):bd08/13/2015:svnLENOVO:pn20BSCTO1WW:pvrThinkPadX1Carbon3rd:rvnLENOVO:rn20BSCTO1WW:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrNone:
  dmi.product.name: 20BSCTO1WW
  dmi.product.version: ThinkPad X1 Carbon 3rd
  dmi.sys.vendor: LENOVO

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