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[Serban Maerean <serbanmaerean@xxxxxxxxxxxx>]

Actually, you helped more than you think. :-)

So I did a little reading about the IOMMU issue and the problem is that
IOMMU itself is not the problem.  It just shows the real problem (I
think this is not new news, really.)  Anyway, the problem appears to be
the xhci_hcd device driver that I cannot disable.  I still don't
understand how that impacts the ethernet device driver, though.

I added the iommu=soft option to the boot menu and it seems that the
kernel is more lenient in treating the xhci_hcd mis-behavior and things
seem to work fine now.  So I guess I'll have to make option permanent
for the boot image.  That means I need to do that for every kernel
update.  Yuck.

Thanks so much.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1447053

Title:
  IO_PAGE_FAULT

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Since a couple of weeks I'm experiencing a problem with my
  motherboard. For some reason the network goes randomly offline and I
  get a error messages about AMD-Vi.

  [ 6462.248434] AMD-Vi: Event logged [IO_PAGE_FAULT device=04:00.0
  domain=0x0019 address=0x0000000000003000 flags=0x0050]

  I didn't changed anything except for the internet modem is changed and
  I installed updates as I always do. When using google I see there are
  more people with this problem exactly the same motherboard, I find
  this strange because my pc is almost a year old and I never had this
  problem. Could it be a problem in the kernel of *ubuntu 14.04?

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-49-generic 3.13.0-49.83
  ProcVersionSignature: Ubuntu 3.13.0-49.83-generic 3.13.11-ckt17
  Uname: Linux 3.13.0-49-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.1-0ubuntu3.10
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  allard     2282 F.... pulseaudio
                        allard     2467 F.... pulseaudio
   /dev/snd/controlC0:  allard     2282 F.... pulseaudio
                        allard     2467 F.... pulseaudio
  CurrentDesktop: KDE
  Date: Wed Apr 22 11:34:46 2015
  HibernationDevice: RESUME=UUID=96633d31-18c6-4b01-b756-f5f919c43fb4
  InstallationDate: Installed on 2015-03-27 (25 days ago)
  InstallationMedia: Kubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  IwConfig:
   eth0      no wireless extensions.
   
   lo        no wireless extensions.
  MachineType: System manufacturer System Product Name
  ProcFB:
   
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-49-generic root=UUID=2c77ade3-e2ea-4d88-94d6-e131053f8ac8 ro quiet splash
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-49-generic N/A
   linux-backports-modules-3.13.0-49-generic  N/A
   linux-firmware                             1.127.11
  RfKill:
   
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/02/2015
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 2204
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: A88XM-A
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: Rev X.0x
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr2204:bd04/02/2015:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnA88XM-A:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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