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[Søren Laursen <sl@xxxxxxxxxx>]

Looks a lot like this bug:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1013199

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https://bugs.launchpad.net/bugs/1213887

Title:
  Bridge does not work i ubuntu 12.04 - kernel  3.5.0-37

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  We are using ganeti on a HP ProLiant DL380p Gen8.

  We are running kvm as virtualization.

  Then enable a new ganeti instance, the kernel will make a new network
  interface (TAPx). After a minut or two, the instance starts to drop
  packages.  Ping is sufficent.

  We have tried on different network cards on the server, and all fails.

  Changing to different kernels has not solved the problems.

  Currently we have 6  ProLiant DL380p Gen7 running on the same
  configuration with no problems at all.

  Regards

  Søren Laursen

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.5.0-37-generic 3.5.0-37.58~precise1
  ProcVersionSignature: Ubuntu 3.5.0-37.58~precise1-generic 3.5.7.16
  Uname: Linux 3.5.0-37-generic x86_64
  AlsaDevices:
   total 0
   crw-rw---T 1 root audio 116,  1 Aug 16 11:08 seq
   crw-rw---T 1 root audio 116, 33 Aug 16 11:08 timer
  AplayDevices: Error: [Errno 2] No such file or directory
  ApportVersion: 2.0.1-0ubuntu17.4
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  CRDA: Error: [Errno 2] No such file or directory
  Date: Mon Aug 19 13:05:33 2013
  HibernationDevice: RESUME=UUID=eb9606b5-5c67-4221-82c4-13d0f88abba9
  InstallationMedia: Ubuntu-Server 12.04.2 LTS "Precise Pangolin" - Release amd64 (20130214)
  MachineType: HP ProLiant DL380p Gen8
  MarkForUpload: True
  PciMultimedia:
   
  ProcEnviron:
   LANGUAGE=en_GB:en
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-37-generic root=UUID=3a6a448e-8900-4eb5-b203-f5ddd1fbe28d ro
  RelatedPackageVersions:
   linux-restricted-modules-3.5.0-37-generic N/A
   linux-backports-modules-3.5.0-37-generic  N/A
   linux-firmware                            1.79.6
  RfKill: Error: [Errno 2] No such file or directory
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/14/2012
  dmi.bios.vendor: HP
  dmi.bios.version: P70
  dmi.chassis.type: 23
  dmi.chassis.vendor: HP
  dmi.modalias: dmi:bvnHP:bvrP70:bd12/14/2012:svnHP:pnProLiantDL380pGen8:pvr:cvnHP:ct23:cvr:
  dmi.product.name: ProLiant DL380p Gen8
  dmi.sys.vendor: HP

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