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[Michael Murphy <1297464@xxxxxxxxxxxxxxxxxx>]

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1309578 This is the
exact same bug report (I even have the exact same hardware offsite in my
Richland machine, which is affected by the bug worse) It may be
different hardware than what I uploaded with apport, but it's the same
architecture (Northern Islands) and therefore has the same Radeon DPM
issues.

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https://bugs.launchpad.net/bugs/1297464

Title:
  1002:6739 Unable to boot 14.04

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  I've noticed after installing Ubuntu 14.04 on my computer, that a DPM
  issue exists. DPM needs to be disabled by default like in kernel 3.14
  so that the live CD or desktop session does not instantly reboot the
  machine.

  WORKAROUND: Edit grub.cfg on the bootable flash drive and adding
  radeon.dpm=0 to the boot options, along with cd'ing to
  /target/etc/default and editing grub with the same change before
  rebooting after installation to bypass it.

  ---
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ubuntu     2789 F.... pulseaudio
   /dev/snd/controlC1:  ubuntu     2789 F.... pulseaudio
  CasperVersion: 1.340
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 14.04
  IwConfig:
   eth0      no wireless extensions.

   lo        no wireless extensions.
  LiveMediaBuild: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: System manufacturer System Product Name
  Package: linux (not installed)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=(loop)/casper/vmlinuz.efi root=UUID=E3B4-EDF6 debian-installer/language=en keyboard-configuration/layoutcode=us iso-scan/filename=/username-14.04-desktop-amd64.iso boot=casper file=/cdrom/preseed/username.seed noprompt quiet splash radeon.dpm=0 --
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-24-generic N/A
   linux-backports-modules-3.13.0-24-generic  N/A
   linux-firmware                             1.127
  RfKill:

  Tags:  trusty
  Uname: Linux 3.13.0-24-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 06/17/2010
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 2102
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: M4A79XTD EVO
  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.:bvr2102:bd06/17/2010:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM4A79XTDEVO: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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