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[Stefan Bader <stefan.bader@xxxxxxxxxxxxx>]

[ 6732.868007] mce: [Hardware Error]: CPU 0: Machine Check Exception: 4 Bank 4: b200000000070f0f
[ 6732.868007] mce: [Hardware Error]: TSC 71912a367e5 
[ 6732.868007] mce: [Hardware Error]: PROCESSOR 2:10ff0 TIME 1412263116 SOCKET 0 APIC 0 microcode 41
[ 6732.868007] mce: [Hardware Error]: Run the above through 'mcelog --ascii'
[ 6732.868007] mce: [Hardware Error]: Machine check: Processor context corrupt
[ 6732.868007] Kernel panic - not syncing: Fatal machine check on current CPU
[ 6732.868007] Kernel Offset: 0x0 from 0xc1000000 (relocation range: 0xc0000000-0xf83fdfff)

Just as additional data, this happened when trying to reboot via serial
console.

-- 
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/1375652

Title:
  [Utopic] nouveau flush timeout lockups

Status in “xserver-xorg-video-nouveau” package in Ubuntu:
  New

Bug description:
  Needs more investigation but the system feels sluggish (video operations not always smooth). This morning I had a crash in firefox (may not be related) and it does not always seem to be reproducible. Yesterday I was able to run glxgears and play a video stream through firefox for quite some time without issues. So HW failure from old age might be a reason, too.
  With the initial install the lockups always seemed to happen when opening a selection dropbox (like the timeout for blanking the screen in the settings). Yesterday (after getting console to be a serial one) the lockup happened on the youtube front-page. After a reboot it did not happen again and today (after dist-upgrading) it just happened again (on some youtube page).

  For yesterday and today, mouse still moved but gui was not responding.
  Also would not allow to switch to any vt. Serial console was still
  working and showed:

  nouveau [W_PCIEGART] [0000:01:00.0] flush timeout, 0x00000002

  Today also (after a while):

  nouveau E[Xorg[1500]] failed to idle channel 0xcccc0000 [Xorg[1500]]

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2
  ProcVersionSignature: Ubuntu 3.16.0-18.25-generic 3.16.3
  Uname: Linux 3.16.0-18-generic i686
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.14.7-0ubuntu2
  Architecture: i386
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  CurrentDesktop: Unity
  Date: Tue Sep 30 10:40:50 2014
  DistUpgraded: Fresh install
  DistroCodename: utopic
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   NVIDIA Corporation NV41 [GeForce 6800] [10de:00c1] (rev a2) (prog-if 00 [VGA controller])
     Subsystem: LeadTek Research Inc. Device [107d:2a0c]
  InstallationDate: Installed on 2014-09-25 (4 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Alpha i386 (20140923)
  Lsusb:
   Bus 001 Device 003: ID 1a40:0101 Terminus Technology Inc. 4-Port HUB
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 002 Device 003: ID 04d9:1400 Holtek Semiconductor, Inc. PS/2 keyboard + mouse controller
   Bus 002 Device 002: ID 8054:0001  
   Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MachineType: System manufacturer System name
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.16.0-18-generic root=/dev/mapper/username--vg-root ro priority=low hpet=force console=ttyS0,115200n8
  SourcePackage: xserver-xorg-video-nouveau
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 03/03/2005
  dmi.bios.vendor: Phoenix Technologies, LTD
  dmi.bios.version: ASUS A8N-SLI DELUXE ACPI BIOS Revision 1006
  dmi.board.name: A8N-SLI DELUXE
  dmi.board.vendor: ASUSTeK Computer INC.
  dmi.board.version: 1.XX
  dmi.chassis.asset.tag: 123456789000
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvrASUSA8N-SLIDELUXEACPIBIOSRevision1006:bd03/03/2005:svnSystemmanufacturer:pnSystemname:pvr1.XX:rvnASUSTeKComputerINC.:rnA8N-SLIDELUXE:rvr1.XX:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: System name
  dmi.product.version: 1.XX
  dmi.sys.vendor: System manufacturer
  version.compiz: compiz 1:0.9.12+14.10.20140918-0ubuntu1
  version.libdrm2: libdrm2 2.4.56-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.3.0-0ubuntu2
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.3.0-0ubuntu2
  version.xserver-xorg-core: xserver-xorg-core 2:1.16.0-1ubuntu1
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.4.0-2ubuntu2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.914-1~exp1ubuntu3
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2
  xserver.bootTime: Tue Sep 30 10:39:42 2014
  xserver.configfile: default
  xserver.devices:
   input        Power Button         KEYBOARD, id 6
   input        Power Button         KEYBOARD, id 7
   input        HID 04d9:1400        KEYBOARD, id 8
   input        HID 04d9:1400        KEYBOARD, id 9
  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: 2:1.16.0-1ubuntu1
  xserver.video_driver: nouveau

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