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[Austin <1252501@xxxxxxxxxxxxxxxxxx>]

linux-image-3.11.8-031108-generic works.

** Attachment added: "uname-srv.txt"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1252501/+attachment/3912888/+files/uname-srv.txt

** Tags added: kernel-fixed-upstream

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https://bugs.launchpad.net/bugs/1252501

Title:
  Unable to boot xen with iommu

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  This morning, after first installing the package, I was uanble to boot
  linux-image-3.11.0-13-generic with default boot entries to have xen
  hvm 4.3 with iommu enabled. Without additional parameters, the boot
  process would hang (blank screen) where disks are normally mounted.
  After reaching the blank screen, it would not respond to Ctrl+Alt+Del.
  Hard reset was required. If I passed iommu=off or nomodeset as boot
  parameters, it would boot with xen. Booting without xen also worked
  normally.

  linux-image-3.11.0-12-generic continues to work with xen and iommu
  enabled without additional boot parameters. I have attached xen's
  dmesg under linux-image-3.11.0-12-generic  in case it is of interest.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.11.0-13-generic 3.11.0-13.20
  ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
  Uname: Linux 3.11.0-12-generic x86_64
  ApportVersion: 2.12.5-0ubuntu2.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  austin     2698 F.... pulseaudio
  Date: Mon Nov 18 15:29:42 2013
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=36ffd2a3-104d-45fa-bf13-964d55db955e
  InstallationDate: Installed on 2013-01-22 (300 days ago)
  InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1)
  MachineType: Hewlett-Packard HP Compaq dc7900 Convertible Minitower
  MarkForUpload: True
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: placeholder root=UUID=6ce9f617-e442-429c-91e8-75d1ea79ec98 ro
  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:
   
  SourcePackage: linux
  UpgradeStatus: Upgraded to saucy on 2013-10-18 (31 days ago)
  dmi.bios.date: 03/05/2009
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: 786G1 v01.16
  dmi.board.asset.tag: MXL9191J92
  dmi.board.name: 3032h
  dmi.board.vendor: Hewlett-Packard
  dmi.chassis.asset.tag: MXL9191J92
  dmi.chassis.type: 6
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvr786G1v01.16:bd03/05/2009:svnHewlett-Packard:pnHPCompaqdc7900ConvertibleMinitower:pvr:rvnHewlett-Packard:rn3032h:rvr:cvnHewlett-Packard:ct6:cvr:
  dmi.product.name: HP Compaq dc7900 Convertible Minitower
  dmi.sys.vendor: Hewlett-Packard

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