There have been cases of routers which get into a state where they are
sending corrupted beacons which the iwlwifi firmware rejects, which can
lead to the types of disconnections I see in your logs. It's possible
that this is what happened, and when you updated (and presumably
rebooted) your router it cleared up the issue.

I'm closing the bug as invalid. If you see issues again you can reopen
this bug.

** Changed in: linux (Ubuntu)
       Status: Incomplete => Invalid

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https://bugs.launchpad.net/bugs/1366248

Title:
  [Intel D54250WYK] Wireless Dropped Connection Intel 7260.HMWG

Status in “linux” package in Ubuntu:
  Invalid

Bug description:
  The wireless connection is dropping once again.  Everything seemed
  fine after the last dist-upgrade on or around 8/29.  An apt-get
  update/upgrade between 8/29 and 9/3 seems to have introduced this bug.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-35-generic 3.13.0-35.62
  ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6
  Uname: Linux 3.13.0-35-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  justin     1549 F.... pulseaudio
   /dev/snd/controlC0:  justin     1549 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Fri Sep  5 19:51:33 2014
  HibernationDevice: RESUME=UUID=8048d919-eb4b-45eb-a626-ebd626d468f1
  InstallationDate: Installed on 2014-04-25 (133 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-35-generic.efi.signed 
root=UUID=ba994e83-d5aa-4912-825f-c6d10a7d86ae ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-35-generic N/A
   linux-backports-modules-3.13.0-35-generic  N/A
   linux-firmware                             1.127.5
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 03/03/2014
  dmi.bios.vendor: Intel Corp.
  dmi.bios.version: WYLPT10H.86A.0025.2014.0303.1008
  dmi.board.name: D54250WYK
  dmi.board.vendor: Intel Corporation
  dmi.board.version: H13922-303
  dmi.chassis.type: 3
  dmi.modalias: 
dmi:bvnIntelCorp.:bvrWYLPT10H.86A.0025.2014.0303.1008:bd03/03/2014:svn:pn:pvr:rvnIntelCorporation:rnD54250WYK:rvrH13922-303:cvn:ct3:cvr:

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