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[Erick Brunzell <lbsolost@xxxxxxxxx>]

I believe I encountered the same issue while working on bug #1412602
which is unrelated to this bug.

In the process of testing the nouveau driver with an nVidia C61 [GeForce
7025 / nForce 630a] chipset on Ubuntu GNOME Trusty with the Utopic HWE
and 3.16.0-31-generic from trusty-proposed I experienced what I'd call a
soft-lockup (I could still move the mouse pointer but all else was
unresponsive) and after a minute or two the screen went basically blank
with this message sprawled across the screen:

[ 1206.026900] nouveau E[     DRM] GPU lockup - switching to software
fbcon

[ 1305.160013] nouveau E[Xorg[955]] failed to idle channel 0xeeee0000
[Xorg[955]]

[ 1320.160018] nouveau E[Xorg[955]] failed to idle channel 0xeeee0000
[Xorg[955]]

[ 1328.076012] BUG: soft lockup - GPU#0 stuck for 21sf [gnome-
shell:1740]

After reboot I found a crash report in /var/log/crash but it was
unreportable, the details say:

This problem report is damaged and cannot be processed.

EOF Error('Compressed file ended before the end-of-stream marker was
reached',)

I'm attaching a picture of the screen during freeze.

** Attachment added: "IMG_4845.JPG"
   https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-nouveau/+bug/1291574/+attachment/4320755/+files/IMG_4845.JPG

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xserver-xorg-video-nouveau in Ubuntu.
https://bugs.launchpad.net/bugs/1291574

Title:
  nouveau DRM GPU lockup, PFIFO unhandled status 0x00800000

Status in xserver-xorg-video-nouveau package in Ubuntu:
  Confirmed

Bug description:
  Usually seen on large screen transitions, often in browser windows.
  Display freezes, and processes disappear.   klog starts with

  nouveau ![   PFIFO][0000:01:00.0] unhandled status 0x00800000
  nouveau E[     DRM] GPU lockup - switching to software fbcon

  and thereafter fills with

  nouveau E[Xorg[1868]] failed to idle channel 0xcccc0001 [Xorg[1868]]
  nouveau E[Xorg[1868]] failed to idle channel 0xcccc0001 [Xorg[1868]]
  nouveau E[   PFIFO][0000:01:00.0] playlist 0 update timeout
  nouveau E[Xorg[1868]] failed to idle channel 0xcccc0000 [Xorg[1868]]
  nouveau E[Xorg[1868]] failed to idle channel 0xcccc0000 [Xorg[1868]]
  nouveau E[   PFIFO][0000:01:00.0] channel 2 [Xorg[1868]] kick timeout
  nouveau E[   PFIFO][0000:01:00.0] channel 2 [Xorg[1868]] kick timeout
  nouveau E[   PFIFO][0000:01:00.0] playlist 0 update timeout

  repeated about every 150 seconds.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
  ProcVersionSignature: Ubuntu 3.13.0-16.36-generic 3.13.5
  Uname: Linux 3.13.0-16-generic i686
  .tmp.unity.support.test.1:
   
  ApportVersion: 2.13.3-0ubuntu1
  Architecture: i386
  CompizPlugins: [core,bailer,detection,composite,opengl,decor,regex,snap,imgpng,move,animation,mousepoll,compiztoolbox,resize,grid,unitymtgrabhandles,workarounds,gnomecompat,vpswitch,place,expo,wall,fade,ezoom,session,scale,unityshell]
  CompositorRunning: None
  Date: Wed Mar 12 15:10:37 2014
  DistUpgraded: 2010-09-09 17:07:06,366 DEBUG enabling apt cron job
  DistroCodename: trusty
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes, including running git bisection searches
  GraphicsCard:
   NVIDIA Corporation GK107 [GeForce GTX 650] [10de:0fc6] (rev a1) (prog-if 00 [VGA controller])
     Subsystem: eVga.com. Corp. Device [3842:2650]
  LightdmGreeterLog:
   (lightdm-gtk-greeter:5159): Gtk-CRITICAL **: gtk_container_foreach: assertion 'GTK_IS_CONTAINER (container)' failed
   
   (lightdm-gtk-greeter:5159): Gtk-CRITICAL **: gtk_container_foreach: assertion 'GTK_IS_CONTAINER (container)' failed
   
   (lightdm-gtk-greeter:5159): Gtk-CRITICAL **: gtk_container_foreach: assertion 'GTK_IS_CONTAINER (container)' failed
  MachineType: MSI MS-7673
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-16-generic root=UUID=44b47c66-6a6d-465d-a0b6-e03e703616cb ro nomdmonddf nomdmonisw nomdmonddf nomdmonisw
  SourcePackage: xserver-xorg-video-nouveau
  UpgradeStatus: Upgraded to trusty on 2010-09-09 (1279 days ago)
  dmi.bios.date: 03/31/2011
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: V1.10
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: P67A-C43 (MS-7673)
  dmi.board.vendor: MSI
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: MSI
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV1.10:bd03/31/2011:svnMSI:pnMS-7673:pvr1.0:rvnMSI:rnP67A-C43(MS-7673):rvr1.0:cvnMSI:ct3:cvr1.0:
  dmi.product.name: MS-7673
  dmi.product.version: 1.0
  dmi.sys.vendor: MSI
  version.compiz: compiz 1:0.9.11+14.04.20140305-0ubuntu1
  version.libdrm2: libdrm2 2.4.52-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.0~rc3-0ubuntu3
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.0~rc3-0ubuntu3
  version.xserver-xorg-core: xserver-xorg-core 2:1.15.0-1ubuntu6
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
  xserver.bootTime: Wed Mar 12 15:10:05 2014
  xserver.configfile: default
  xserver.devices:
   input        Power Button         KEYBOARD, id 6
   input        Power Button         KEYBOARD, id 7
   input        daskeyboard          KEYBOARD, id 8
   input        daskeyboard          KEYBOARD, id 9
   input        Logitech USB-PS/2 Optical Mouse MOUSE, id 10
  xserver.errors:
   Failed to load module "nvidia" (module does not exist, 0)
   Failed to load module "nvidia" (module does not exist, 0)
  xserver.logfile: /var/log/Xorg.0.log
  xserver.version: 2:1.15.0-1ubuntu6
  xserver.video_driver: nouveau

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