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[cmavr8 <1079440@xxxxxxxxxxxxxxxxxx>]

I experience the same, in a 13.04 Lenovo Thinkpad X201s with i915
graphics. Updated but not upgraded to 13.10. Latest BIOS flashed
yesterday. Problem existed before and after flashing.

The following phrase (copied from another comment) describes my experience exactly:
"After a few minutes it freezes up in such a way that mouse movement can be seen but nothing can be clicked or typed. Forced rebooting with the power switch is the only option."

Most logs in /var/log show nothing interesting. The event happened a bit
before time 39909 so here's Xorg.0.log's relevant part (attached).

It only happens when I try to wake the screens up after they have turned
off. If I disable screen auto off function I am fine. Ctrl+Alt+Backspace
works so I just relogin. Very annoying when I have virtual machines
running though... they get shut off improperly.

** Attachment added: "Xorg.0.log"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1079440/+attachment/3913504/+files/Xorg.0.log

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https://bugs.launchpad.net/bugs/1079440

Title:
  [Dell MP061] i945: Random complete freeze using dual monitors

Status in The Linux Kernel:
  Fix Released
Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  I can run all day without problems if I boot up using just the laptop
  screen, but using an external monitor to extend the viewing area I get
  a crash after about an hour or two of use, 100% guaranteed.  It seems
  completely random.  I was getting similar crashes in 12.04 but using
  2d "fixed" that.  Now with 12.10 I have to use 3d.  By complete freeze
  I mean no mouse click or key press does anything but I can still see
  the cursor move with the mouse.

  When I first installed 12.10 and the system froze I could use ctrl-
  alt-F1 to restart the display manager, but since a recent system
  update ctrl-alt-F1 just switches to a black screen (no text).  Typing
  any kind of command seems to have no effect, so it is more than the
  characters simply not displaying.  So this recent system update seems
  to make the crash more severe when it happens.

  Description:	Ubuntu 12.10
  Release:	12.10

  compiz:
    Installed: 1:0.9.8.4+bzr3407-0ubuntu1
    Candidate: 1:0.9.8.4+bzr3407-0ubuntu1
    Version table:
   *** 1:0.9.8.4+bzr3407-0ubuntu1 0
          500 http://us.archive.ubuntu.com/ubuntu/ quantal-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       1:0.9.8.4-0ubuntu2 0
          500 http://us.archive.ubuntu.com/ubuntu/ quantal/main amd64 Packages

  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: compiz 1:0.9.8.4+bzr3407-0ubuntu1
  ProcVersionSignature: Ubuntu 3.5.0-18.29-generic 3.5.7
  Uname: Linux 3.5.0-18-generic x86_64
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.6.1-0ubuntu6
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  Date: Thu Nov 15 14:13:02 2012
  DistUpgraded: Fresh install
  DistroCodename: quantal
  DistroVariant: ubuntu
  DkmsStatus: vboxhost, 4.2.4, 3.5.0-18-generic, x86_64: installed
  EcryptfsInUse: Yes
  GraphicsCard:
   Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller [8086:27a2] (rev 03) (prog-if 00 [VGA controller])
     Subsystem: Dell Device [1028:01cd]
     Subsystem: Dell Device [1028:01cd]
  InstallationDate: Installed on 2012-10-31 (15 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  MachineType: Dell Inc. MP061
  MarkForUpload: True
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-18-generic root=UUID=0650f48a-9821-4f03-aad9-130f0ff78d65 ro quiet splash vt.handoff=7
  SourcePackage: compiz
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/18/2006
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A06
  dmi.board.name: 0FF049
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA06:bd12/18/2006:svnDellInc.:pnMP061:pvr:rvnDellInc.:rn0FF049:rvr:cvnDellInc.:ct8:cvr:
  dmi.product.name: MP061
  dmi.sys.vendor: Dell Inc.
  version.compiz: compiz 1:0.9.8.4+bzr3407-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.39-0ubuntu1
  version.libgl1-mesa-dri: libgl1-mesa-dri 9.0-0ubuntu1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 9.0-0ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.13.0-0ubuntu6
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.99.99~git20120913.8637f772-0ubuntu1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.9-0ubuntu2
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.2-0ubuntu3

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