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[mdalacu <mdalacu@xxxxxxxxx>]

Sorry to say but it still does not boot. I have installed both debs and choose the .27 version from grub. The same drop to busybox happened.
Do you need me to run some tests?
What's next if there is any?
Thank you for your hard work it's much appreciated.

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https://bugs.launchpad.net/bugs/1159219

Title:
  Ubuntu Raring , IOMMU, fails to boot

Status in “linux” package in Ubuntu:
  Triaged
Status in “linux” source package in Raring:
  New

Bug description:
  My system, Ubuntu 13.04, at boot, it drops to busybox if i have AMD IOMMU enabled in BIOS.
  If i have the option enabled then the system only boots with a kernel version  <= 3.6.
  I have tried all the kernels from Ubuntu Kernel Mainline, 3.8.4 included. 

  The error that it throws during boot, it is:
     AMD-VI: Event logged.. INVALID DEVICE REQUEST
  Thank you.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: linux-image-3.8.0-13-generic 3.8.0-13.23
  ProcVersionSignature: Ubuntu 3.8.0-13.23-generic 3.8.3
  Uname: Linux 3.8.0-13-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.9.2-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  mdalacu    2411 F.... pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  Date: Sat Mar 23 21:39:49 2013
  InstallationDate: Installed on 2010-10-18 (886 days ago)
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
  IwConfig:
   eth0      no wireless extensions.
   
   lo        no wireless extensions.
  MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB:
   
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-13-generic root=UUID=d17fe8b8-a39b-48b6-991a-ea7e7c7a230d ro quiet splash
  RelatedPackageVersions:
   linux-restricted-modules-3.8.0-13-generic N/A
   linux-backports-modules-3.8.0-13-generic  N/A
   linux-firmware                            1.104
  RfKill:
   
  SourcePackage: linux
  UpgradeStatus: Upgraded to raring on 2013-03-13 (9 days ago)
  dmi.bios.date: 01/09/2012
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: P1.70
  dmi.board.name: 890FX Deluxe4
  dmi.board.vendor: ASRock
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP1.70:bd01/09/2012:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rn890FXDeluxe4:rvr:cvnToBeFilledByO.E.M.: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: To Be Filled By O.E.M.

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