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[Daniel Holm <d.holmen@xxxxxxxxx>]

Ok, I first tried to add "options iwlwifi 11ac_disable=1" to
modprobe.conf. No change. Bandwidth is still horrible and everything.
Then I added "options iwlwifi 11n_disable=1" as well.  No change.

After each new row I ran:
sudo modprobe -rfv iwlwifi
sudo modprobe -v iwlwifi

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https://bugs.launchpad.net/bugs/1305305

Title:
  Wifi keeps dropping.

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  Hi,

  Just got myself a Sony Vaio Pro 13 and installed Ubuntu 14.04. All
  packages is the latest.

  The wifi keeps dropping. Sometimes all the time, at times after a bit longer (~10 min).
  Netwiork Managers Connection information doesn't tell me what module is in use, but lsmod contains iwlwifi, which should be the module that the hardware uses since Linux 3.13. 

  A few packages ago it didn't drop, but was really, really, slow. Now
  it completely drops.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-generic 3.13.0.19.23
  ProcVersionSignature: Ubuntu 3.13.0-19.39-generic 3.13.6
  Uname: Linux 3.13.0-19-generic x86_64
  ApportVersion: 2.14.1-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  daniel     2105 F.... pulseaudio
   /dev/snd/controlC1:  daniel     2105 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Wed Apr  9 22:44:08 2014
  HibernationDevice: RESUME=UUID=a8a44495-3583-451d-99c8-b5be0e8cf0ca
  InstallationDate: Installed on 2014-04-09 (0 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140323)
  MachineType: Sony Corporation SVP1321M2EB
  ProcEnviron:
   LANGUAGE=sv
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=sv_SE.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-19-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-19-generic N/A
   linux-backports-modules-3.13.0-19-generic  N/A
   linux-firmware                             1.127
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/21/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: R1043V7
  dmi.board.asset.tag: N/A
  dmi.board.name: VAIO
  dmi.board.vendor: Sony Corporation
  dmi.board.version: N/A
  dmi.chassis.asset.tag: N/A
  dmi.chassis.type: 10
  dmi.chassis.vendor: Sony Corporation
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrR1043V7:bd11/21/2013:svnSonyCorporation:pnSVP1321M2EB:pvrC60C0754:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
  dmi.product.name: SVP1321M2EB
  dmi.product.version: C60C0754
  dmi.sys.vendor: Sony Corporation

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