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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

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

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https://bugs.launchpad.net/bugs/1274641

Title:
  64bit linux on gigabyte motherboards - IOMMU issue?

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  I have a gigabyte GA-970A-DSP3 motherboard, and everything works fine with 32bit Kubuntu 13.10
  After installing 64bit, the USB2 ports on the motherboard didn't work, however the USB3 ports did work. The ethernet (motherboard) and wireless (PCI card) wouldn't connect. They would recognize that the ethernet was plugged in, and detect any wireless networks, but wouldn't connect to them.

  One fix I found for this was to set IOMMU to enabled in the bios, then
  the USB2 ports, ethernet and wireless worked fine, but the USB3 ports
  stopped working.

  I have found others with the same problem with varying models of gigabyte motherboards and distributions of linux.
  http://ubuntuforums.org/showthread.php?t=2114055
  http://ubuntuforums.org/showthread.php?t=2111223

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.11.0-12-generic 3.11.0-12.19 [modified: boot/vmlinuz-3.11.0-12-generic]
  ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
  Uname: Linux 3.11.0-12-generic x86_64
  ApportVersion: 2.12.5-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  mittens    1550 F.... pulseaudio
  Date: Thu Jan 30 18:14:59 2014
  HibernationDevice: RESUME=UUID=e17900d6-0c75-417d-ae3e-7200a6545137
  InstallationDate: Installed on 2014-01-30 (0 days ago)
  InstallationMedia: Kubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MachineType: Gigabyte Technology Co., Ltd. To be filled by O.E.M.
  MarkForUpload: True
  ProcFB: 0 nouveaufb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-12-generic.efi.signed root=UUID=a0b5670e-e822-4a10-99e2-2b68ecd6c078 ro quiet splash
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-12-generic N/A
   linux-backports-modules-3.11.0-12-generic  N/A
   linux-firmware                             1.116
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/08/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: F1
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: 970A-DS3P
  dmi.board.vendor: Gigabyte Technology Co., Ltd.
  dmi.board.version: x.x
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF1:bd04/08/2013:svnGigabyteTechnologyCo.,Ltd.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rn970A-DS3P:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: To be filled by O.E.M.
  dmi.product.version: To be filled by O.E.M.
  dmi.sys.vendor: Gigabyte Technology Co., Ltd.

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