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[Ian Ohr <ian.ohr@xxxxxxxxxxxxxx>]

I have experienced this bug on.

DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=14.04
DISTRIB_CODENAME=trusty
DISTRIB_DESCRIPTION="Ubuntu 14.04.1 LTS"

Ubuntu 3.13.0-40.69-generic 3.13.11.10

I have just switched to the nVidia Proprietary driver as it's happened about four times.
I've attached an exceprt of my /var/log/syslog from when it happened.

** Attachment added: "syslog"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1181441/+attachment/4276333/+files/syslog

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https://bugs.launchpad.net/bugs/1181441

Title:
  10de:05e2 [DX79SI] nouveau corruption and then hang

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  [954574.312907] nouveau E[  PGRAPH][0000:04:00.0] ch 2 [0x0037b10000] subc 0 class 0x0030 mthd 0x0320 data 0x0000000d
  [954574.312921] nouveau E[  PGRAPH][0000:04:00.0]  ILLEGAL_MTHD
  [954574.312924] nouveau E[  PGRAPH][0000:04:00.0] ch 2 [0x0037b10000] subc 0 class 0x0030 mthd 0x0320 data 0x0000000d
  [954574.312937] nouveau E[  PGRAPH][0000:04:00.0]  ILLEGAL_MTHD
  [954574.312940] nouveau E[  PGRAPH][0000:04:00.0] ch 2 [0x0037b10000] subc 0 class 0x0030 mthd 0x0320 data 0x0000000d
  [954574.312955] nouveau E[  PGRAPH][0000:04:00.0]  ILLEGAL_MTHD
  [954574.312958] nouveau E[  PGRAPH][0000:04:00.0] ch 2 [0x0037b10000] subc 0 class 0x0030 mthd 0x0320 data 0x0000000d
  [954574.312973] nouveau E[  PGRAPH][0000:04:00.0]  ILLEGAL_MTHD
  [954574.312976] nouveau E[  PGRAPH][0000:04:00.0] ch 2 [0x0037b10000] subc 0 class 0x0030 mthd 0x0320 data 0x0000000d
  [954574.312991] nouveau E[  PGRAPH][0000:04:00.0]  ILLEGAL_MTHD
  [954574.312994] nouveau E[  PGRAPH][0000:04:00.0] ch 2 [0x0037b10000] subc 0 class 0x0030 mthd 0x0320 data 0x0000000d
  [954574.313009] nouveau E[  PGRAPH][0000:04:00.0]  ILLEGAL_MTHD

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: linux-image-3.8.0-19-generic 3.8.0-19.30
  ProcVersionSignature: Ubuntu 3.8.0-19.30-generic 3.8.8
  Uname: Linux 3.8.0-19-generic x86_64
  ApportVersion: 2.9.2-0ubuntu8
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  bradf     29119 F.... pulseaudio
  Date: Fri May 17 17:14:47 2013
  HibernationDevice: RESUME=UUID=2ba4c12c-dcd8-4594-b6d1-adea5334056d
  InstallationDate: Installed on 2013-04-16 (31 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130414)
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 nouveaufb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-19-generic root=UUID=35ec0203-17b3-4049-8812-4a0c5d95bf2a ro crashkernel=384M-2G:64M,2G-:128M quiet splash vt.handoff=7
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.8.0-19-generic N/A
   linux-backports-modules-3.8.0-19-generic  N/A
   linux-firmware                            1.106
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/22/2013
  dmi.bios.vendor: Intel Corp.
  dmi.bios.version: SIX7910D.86A.1783.2013.0222.1658
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: DX79SI
  dmi.board.vendor: Intel Corporation
  dmi.board.version: AAG28808-500
  dmi.chassis.type: 3
  dmi.modalias: dmi:bvnIntelCorp.:bvrSIX7910D.86A.1783.2013.0222.1658:bd02/22/2013:svn:pn:pvr:rvnIntelCorporation:rnDX79SI:rvrAAG28808-500:cvn:ct3:cvr:

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