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[Tomi Mikkonen <tomi@xxxxxxxxxxxxxx>]

I have the same issue with Ubuntu 14.04 and Lubuntu 14.04
uname -r
3.13.0-32-generic

Radeon driver crashes roughly once every hour :

[84392.248120] radeon 0000:02:00.0: GPU lockup CP stall for more than 10000msec
[84392.248126] radeon 0000:02:00.0: GPU lockup (waiting for 0x0000000000000004 last fence id 0x0000000000000002 on ring 5)
[84392.248129] [drm:uvd_v1_0_ib_test] *ERROR* radeon: fence wait failed (-35).
[84392.248133] [drm:radeon_ib_ring_tests] *ERROR* radeon: failed testing IB on ring 5 (-35).
[84392.414032] [drm:rv770_dpm_set_power_state] *ERROR* rv770_set_sw_state failed

lspci |grep Radeon
02:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV710 [Radeon HD 4350/4550]
02:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] RV710/730 HDMI Audio [Radeon HD 4000 series]

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https://bugs.launchpad.net/bugs/986524

Title:
  1002:6739 [Asus P6T] radeon 0000:02:00.0: GPU lockup CP stall for more
  than 10000msec

Status in linux package in Ubuntu:
  Invalid

Bug description:
  Often, the Xorg session freeze, go to black screen, and is display
  again. Most of the time Xorg stop to respond.

  I'm not sure what exactly is the cause of the problem, probably some
  instructions send to the GPU by compiz, which make the kernel GPU
  code to be locked. So my supposition is that the kernel code can have
  a deadlock situation.

  The only trace of error I have is in the kernel log (the kernel itself
  do not crashed):

  [  808.804250] radeon 0000:02:00.0: GPU lockup CP stall for more than 10000msec
  [  808.804255] GPU lockup (waiting for 0x0000A23F last fence id 0x0000A23E)
  [  808.805394] radeon 0000:02:00.0: GPU softreset 
  [  808.805398] radeon 0000:02:00.0:   GRBM_STATUS=0xB2703828
  [  808.805401] radeon 0000:02:00.0:   GRBM_STATUS_SE0=0x1C000007
  [  808.805404] radeon 0000:02:00.0:   GRBM_STATUS_SE1=0x08000007
  [  808.805407] radeon 0000:02:00.0:   SRBM_STATUS=0x200000C0
  [  808.805422] radeon 0000:02:00.0:   GRBM_SOFT_RESET=0x00007F6B
  [  808.805526] radeon 0000:02:00.0:   GRBM_STATUS=0x00003828
  [  808.805529] radeon 0000:02:00.0:   GRBM_STATUS_SE0=0x00000007
  [  808.805532] radeon 0000:02:00.0:   GRBM_STATUS_SE1=0x00000007
  [  808.805535] radeon 0000:02:00.0:   SRBM_STATUS=0x200000C0
  [  808.806535] radeon 0000:02:00.0: GPU reset succeed
  [  808.832454] [drm] PCIE GART of 512M enabled (table at 0x0000000000040000).
  [  808.832587] radeon 0000:02:00.0: WB enabled
  [  808.849202] [drm] ring test succeeded in 2 usecs
  [  808.849217] [drm] ib test succeeded in 3 usecs

  This can loop 1 to 5 times, with a few seconds between them. This situation can happens any time, and rarely I can continue to use my session.
  Like I said, the kernel itself do not crash, generally, I login using an another computer with ssh, and type "sudo reboot".

  I have earch a little for that problem, I've found some, having "GPU
  lockup CP stall for more than 10000msec" but they seems to not be
  related to my problem.

  My ATI card is an "Sapphire Radeon HD 6850 1Go", and I use the free
  software driver. Using the previous version of Ubuntu I didn't have
  this error.

  I have almost no hope to have this bug fixed (too few infos, no one
  having it), but is there some method I can use to get more
  informations on this problem ? I will try a kernel debugging, but for
  a "random" bug, it will be more harder. Some day it crash, some it
  don't crash!

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-23-generic 3.2.0-23.36
  ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
  Uname: Linux 3.2.0-23-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  vono       2113 F.... pulseaudio
   /dev/snd/controlC2:  vono       2113 F.... pulseaudio
   /dev/snd/controlC0:  vono       2113 F.... pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xf3cf8000 irq 69'
     Mixer name	: 'Realtek ALC1200'
     Components	: 'HDA:10ec0888,10438357,00100101'
     Controls      : 45
     Simple ctrls  : 21
  Card1.Amixer.info:
   Card hw:1 'XFi'/'Creative X-Fi 20K1 SB073x'
     Mixer name	: '20K1'
     Components	: ''
     Controls      : 27
     Simple ctrls  : 10
  Card2.Amixer.info:
   Card hw:2 'Generic'/'HD-Audio Generic at 0xf3dfc000 irq 70'
     Mixer name	: 'ATI R6xx HDMI'
     Components	: 'HDA:1002aa01,00aa0100,00100200'
     Controls      : 6
     Simple ctrls  : 1
  Card2.Amixer.values:
   Simple mixer control 'IEC958',0
     Capabilities: pswitch pswitch-joined penum
     Playback channels: Mono
     Mono: Playback [on]
  CurrentDmesg:
   [   16.527645] r8169 0000:05:00.0: eth0: link up
   [   16.528212] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
   [   27.448590] eth0: no IPv6 routers present
  Date: Sat Apr 21 12:25:11 2012
  HibernationDevice: RESUME=UUID=6ebce938-3b5b-49a8-a605-570468643a2d
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120301)
  IwConfig:
   lo        no wireless extensions.
   
   eth0      no wireless extensions.
  MachineType: System manufacturer System Product Name
  ProcEnviron:
   TERM=xterm
   PATH=(custom, user)
   LANG=fr_FR.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-23-generic root=UUID=2179744d-7479-4972-970d-26d1713623d1 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-23-generic N/A
   linux-backports-modules-3.2.0-23-generic  N/A
   linux-firmware                            1.79
  RfKill:
   
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/26/2009
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 0403
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: P6T
  dmi.board.vendor: ASUSTeK Computer INC.
  dmi.board.version: Rev 1.xx
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0403:bd02/26/2009:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP6T:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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