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[Arthur Fragoso <arthur@xxxxxxxxxxx>]

I tested on 3.16-rc6-utopic and the problem was still there.

I also downloaded an old kernel, the v3.4-rc6-precise to test if it was
working in a past kernel, and it was working without problems.

I'm going to test other kernel versions to see in what version the bug
was introduced.

** Tags added: kernel-bug-exists-upstream kernel-bug-exists-
upstream-3.16-rc6

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

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https://bugs.launchpad.net/bugs/1349000

Title:
  Networking - Destination unreachable (Fragmentation needed)

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  A few years ago, I was using Fedora 16 and I was unable to do any HTTP POST at the place where I work. So I tried Ubuntu 12.04 (or 12.10, I'm not quite sure) and it worked perfectly.
  Recently I updated it to 14.04 and the same problem I had in Fedora came back.
  I'm not an expert in understanding these network packages, but I read that it could be that the network manager could had blocked the ICMP MTU dicovery package. I can check and if it is so I can ask him to unblock it, but I think that more people could also have this problem, so I wonder how it was working in the previous 12.04/12.10 version and if it should work the same in the new version.
  Or maybe it's a different problem, I only have this problem at the place where I work.

  $ cat /proc/version_signature
  Ubuntu 3.13.0-32.57-generic 3.13.11.4

  $ lsb_release -rd
  Description:	Ubuntu 14.04.1 LTS
  Release:	14.04

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-32-generic 3.13.0-32.57
  ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
  Uname: Linux 3.13.0-32-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  arthur     3196 F.... pulseaudio
   /dev/snd/controlC0:  arthur     3196 F.... pulseaudio
   /dev/snd/pcmC0D0p:   arthur     3196 F...m pulseaudio
  CurrentDesktop: Unity
  Date: Sat Jul 26 17:16:31 2014
  HibernationDevice: RESUME=UUID=2a262003-49b8-4b6d-b2a5-4b93996c92cb
  InstallationDate: Installed on 2013-08-09 (351 days ago)
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
  MachineType: Dell Inc. XPS L501X
  ProcFB:

  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-32-generic root=/dev/mapper/fedora_xps-ubuntu_root ro quiet splash
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-32-generic N/A
   linux-backports-modules-3.13.0-32-generic  N/A
   linux-firmware                             1.127.5
  SourcePackage: linux
  UpgradeStatus: Upgraded to trusty on 2014-03-15 (133 days ago)
  dmi.bios.date: 07/26/2011
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A08
  dmi.board.name: 00YWG2
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A08
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: A08
  dmi.modalias: dmi:bvnDellInc.:bvrA08:bd07/26/2011:svnDellInc.:pnXPSL501X:pvrA08:rvnDellInc.:rn00YWG2:rvrA08:cvnDellInc.:ct8:cvrA08:
  dmi.product.name: XPS L501X
  dmi.product.version: A08
  dmi.sys.vendor: Dell Inc.

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