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[Andy Whitcroft <apw@xxxxxxxxxxxxx>]

** Also affects: linux (Ubuntu Trusty)
   Importance: Undecided
       Status: New

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

Title:
  1002:6739 14.04 randomly reboots

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

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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