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[decoder <decoder-ubuntu@xxxxxxxxxxxx>]

I can fully confirm the original reporter's observations. I have a 2nd
generation Thinkpad X1 Carbon here with the same wireless card and I had
exactly the same symptoms:

* Connectivity losses
* Bad performance
* Once the device uses wireless (e.g. a download), all other devices in the same wireless network experience problems (e.g. very high latency with spikes up to 2000ms).

I've disabled the -8 firmware as described in comment 0 and so far, all
issues are gone.

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https://bugs.launchpad.net/bugs/1293569

Title:
  iwlwifi-7260-8.ucode causes network disconnections problems

Status in “linux-firmware” package in Ubuntu:
  Confirmed

Bug description:
  Running 14.04 (beta) with Kernel 3.13.0-17-generic

  I've encountered a strange and reproducible error with the
  iwlwifi-7260-8.ucode firmware.

  This laptop is a Dell XPS 12 (haswell). With the -8 firmware, it will
  connect fine to wifi for 30 or 40 mins at a time, then will start
  dropping connections repeatedly. Even modprobe -r unloading and
  reloading doesn't fix the issue, only a reboot will temporarily solve
  it for 40 mins at a time.

  Moreover, here is what's strange, is during these episodes of
  disconnection it seems to affect the actual router (2Wire), as the
  other devices in the house will also start to have issues (very slow
  connections, limited range,etc).  Once I reboot this laptop everything
  and all devices will return to normal.

  This issue has been fixed by me manually removing the -8 firware from
  /lib/firmware and letting the -7 firmware load instead. Since that has
  been done there has not been a single issue of this happening (now
  going on 4 days).

  let me know if there is any other information you would like me to
  provide.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-firmware 1.126
  ProcVersionSignature: Ubuntu 3.13.0-17.37-generic 3.13.6
  Uname: Linux 3.13.0-17-generic x86_64
  ApportVersion: 2.13.3-0ubuntu1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Mon Mar 17 08:13:25 2014
  Dependencies:
   
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-03-07 (9 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140307)
  PackageArchitecture: all
  SourcePackage: linux-firmware
  UpgradeStatus: No upgrade log present (probably fresh install)

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