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[galen <frederic.lessard@xxxxxxxxx>]

Additional Information :

The bug does not occur after installing proprietary graphics drivers.
Tested with kernels 3.14, 3.15, 3.16 (utopic), 3.16.0-031600rc5-generic. ( mainline builds )
Video Card: Radeon HD 7850

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https://bugs.launchpad.net/bugs/1341997

Title:
  1002:683f [Intel DH77EB] Radeon drivers extremely flaky

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  The drivers on AMD Radeon are extremely flaky now. They crash several
  times a day with symptoms ranging from instant hard freezes to
  flickering of the image followed by colors weirdly changing, e.g. the
  drop shadows on windows turning bright red. During the latest crash,
  the following was printed to dmesg several thousand times:

  [ 2059.396715] radeon 0000:01:00.0: GPU fault detected: 146 0x0ea20804
  [ 2059.396716] radeon 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x00000000
  [ 2059.396717] radeon 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x00000000
  [ 2059.396718] VM fault (0x00, vmid 0) at page 0, read from unknown (0)

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: linux-image-3.16.0-3-generic 3.16.0-3.8
  ProcVersionSignature: Ubuntu 3.16.0-3.8-generic 3.16.0-rc4
  Uname: Linux 3.16.0-3-generic x86_64
  ApportVersion: 2.14.4-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  jpakkane   2631 F.... pulseaudio
   /dev/snd/controlC1:  jpakkane   2631 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Tue Jul 15 09:50:27 2014
  InstallationDate: Installed on 2013-05-20 (420 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
  IwConfig:
   eth0      no wireless extensions.
   
   lo        no wireless extensions.
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-3.16.0-3-generic root=UUID=7dd49803-456a-4327-aeb5-7ea47105ef3e ro rootflags=subvol=@ quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.16.0-3-generic N/A
   linux-backports-modules-3.16.0-3-generic  N/A
   linux-firmware                            1.132
  RfKill:
   
  SourcePackage: linux
  UpgradeStatus: Upgraded to utopic on 2014-05-21 (54 days ago)
  dmi.bios.date: 05/16/2013
  dmi.bios.vendor: Intel Corp.
  dmi.bios.version: EBH7710H.86A.0101.2013.0516.1649
  dmi.board.name: DH77EB
  dmi.board.vendor: Intel Corporation
  dmi.board.version: AAG39073-304
  dmi.chassis.type: 3
  dmi.modalias: dmi:bvnIntelCorp.:bvrEBH7710H.86A.0101.2013.0516.1649:bd05/16/2013:svn:pn:pvr:rvnIntelCorporation:rnDH77EB:rvrAAG39073-304:cvn:ct3:cvr:

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