** Tags added: needs-upstream-testing

** Description changed:

  Starting from today, whenever I (try to) start a virtual machine in
  VirtualBox, the host system suddenly reboots without warning, without
  even shutting down.
  
  There's certainly some bug in VirtualBox, but if a program, no matter
  how buggy or even malicious, can cause the whole operating system to
  reboot suddenly, there's by definition some very serious bug in the
  operating system itself.
+ 
+ WORKAROUND: Disabling 3D _and_ 2D acceleration in the virtual machine
+ fixed the issue.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-24-generic 3.2.0-24.39
  ProcVersionSignature: Ubuntu 3.2.0-24.39-generic 3.2.16
  Uname: Linux 3.2.0-24-generic i686
  NonfreeKernelModules: nvidia
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu8
  Architecture: i386
  AudioDevicesInUse:
-  USER        PID ACCESS COMMAND
-  /dev/snd/controlC0:  teo        2451 F.... pulseaudio
+  USER        PID ACCESS COMMAND
+  /dev/snd/controlC0:  teo        2451 F.... pulseaudio
  Card0.Amixer.info:
-  Card hw:0 'Intel'/'HDA Intel at 0xfebf8000 irq 49'
-    Mixer name : 'Realtek ALC660-VD'
-    Components : 'HDA:10ec0660,10430000,00100001 
HDA:10573055,10431316,00100700'
-    Controls      : 28
-    Simple ctrls  : 16
+  Card hw:0 'Intel'/'HDA Intel at 0xfebf8000 irq 49'
+    Mixer name : 'Realtek ALC660-VD'
+    Components : 'HDA:10ec0660,10430000,00100001 
HDA:10573055,10431316,00100700'
+    Controls      : 28
+    Simple ctrls  : 16
  Date: Fri May 25 19:25:15 2012
  HibernationDevice: RESUME=UUID=b1b3e5fe-38e2-44c9-9e48-4564cd9f4d66
  InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
  MachineType: ASUSTeK Computer Inc. M51Sn
  ProcEnviron:
-  TERM=xterm
-  PATH=(custom, user)
-  LANG=en_US.UTF-8
-  SHELL=/bin/bash
+  TERM=xterm
+  PATH=(custom, user)
+  LANG=en_US.UTF-8
+  SHELL=/bin/bash
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-24-generic 
root=UUID=173acbf5-26a0-49e3-8d2b-f1c142582cbf ro quiet splash vt.handoff=7
  RelatedPackageVersions:
-  linux-restricted-modules-3.2.0-24-generic N/A
-  linux-backports-modules-3.2.0-24-generic  N/A
-  linux-firmware                            1.79
+  linux-restricted-modules-3.2.0-24-generic N/A
+  linux-backports-modules-3.2.0-24-generic  N/A
+  linux-firmware                            1.79
  SourcePackage: linux
  StagingDrivers: zram
  UpgradeStatus: Upgraded to precise on 2012-05-17 (8 days ago)
  UserAsoundrc:
-  pcm.!default { type pulse }
-  ctl.!default { type pulse }
-  pcm.pulse { type pulse }
-  ctl.pulse { type pulse }
+  pcm.!default { type pulse }
+  ctl.!default { type pulse }
+  pcm.pulse { type pulse }
+  ctl.pulse { type pulse }
  dmi.bios.date: 12/24/2007
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 303
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: M51Sn
  dmi.board.vendor: ASUSTeK Computer Inc.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: ATN12345678901234567
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK Computer Inc.
  dmi.chassis.version: 1.0
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr303:bd12/24/2007:svnASUSTeKComputerInc.:pnM51Sn:pvr1.0:rvnASUSTeKComputerInc.:rnM51Sn:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
  dmi.product.name: M51Sn
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK Computer Inc.

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https://bugs.launchpad.net/bugs/1004597

Title:
  Sudden hard reset (reboot) caused by VirtualBox

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