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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

This issue appears to be an upstream bug, since you tested the latest
upstream kernel. Would it be possible for you to open an upstream bug
report[0]? That will allow the upstream Developers to examine the issue,
and may provide a quicker resolution to the bug.

Please follow the instructions on the wiki page[0]. The first step is to
email the appropriate mailing list. If no response is received, then a
bug may be opened on bugzilla.kernel.org.

Once this bug is reported upstream, please add the tag: 'kernel-bug-
reported-upstream'.

[0] https://wiki.ubuntu.com/Bugs/Upstream/kernel

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

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

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

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https://bugs.launchpad.net/bugs/1304655

Title:
  ASUS Crosshair IV Formula AMD Firmware Bug AMD-Vi IOAPIC not in IVRS
  table

Status in “linux” package in Ubuntu:
  Triaged

Bug description:
  When running 14.04 on the Asus Crosshair IV Formula with the IOMMU enabled and AMD-virtualization enabled.  The dmesg -l err shows:
  [    0.108481] [Firmware Bug]: AMD-Vi: IOAPIC[6] not in IVRS table
  [    0.108483] [Firmware Bug]: AMD-Vi: No southbridge IOAPIC found
  [    0.108484] AMD-Vi: Disabling interrupt remapping

  This also occurs when loading with the the latest mainline kernel
  3.14.0-031400-generic

  Expected no dmesg errors

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-23-generic 3.13.0-23.45
  ProcVersionSignature: Ubuntu 3.13.0-23.45-generic 3.13.8
  Uname: Linux 3.13.0-23-generic x86_64
  ApportVersion: 2.14.1-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC3:  jonathan   3204 F.... pulseaudio
   /dev/snd/controlC2:  jonathan   3204 F.... pulseaudio
   /dev/snd/controlC1:  jonathan   3204 F.... pulseaudio
   /dev/snd/controlC0:  jonathan   3204 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Tue Apr  8 16:24:07 2014
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=5aba1ebe-fee7-4527-b2a4-ac022892d6fd
  InstallationDate: Installed on 2012-11-29 (494 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  IwConfig:
   eth0      no wireless extensions.
   
   lo        no wireless extensions.
  MachineType: System manufacturer System Product Name
  ProcFB:
   0 radeondrmfb
   1 radeondrmfb
   2 radeondrmfb
   3 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-23-generic root=UUID=c4ec6b3f-ea2f-479a-9ad4-f1eab2c84e9c ro quiet splash crashkernel=384M-:128M crashkernel=384M-:128M crashkernel=384M-:128M vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-23-generic N/A
   linux-backports-modules-3.13.0-23-generic  N/A
   linux-firmware                             1.127
  RfKill:
   
  SourcePackage: linux
  UpgradeStatus: Upgraded to trusty on 2014-03-28 (10 days ago)
  dmi.bios.date: 09/14/2012
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 2101
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: Crosshair IV Formula
  dmi.board.vendor: ASUSTeK Computer INC.
  dmi.board.version: Rev 1.xx
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr2101:bd09/14/2012:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnCrosshairIVFormula:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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