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[LAZA <1264720@xxxxxxxxxxxxxxxxxx>]

Christoper, i think, that NOT VirtualBox is the problem/bug.

It seems that the kernel and/or other circumstances trigger the bug.
VirtualBox itself works flawless and as expected.

The massive operations on my LVM2 in combination of ext4 is for me the problem...
I filed a second report here:
#1265363

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https://bugs.launchpad.net/bugs/1264720

Title:
  /home mounted as read-only while testing with/in VirtualBox - EXT4-fs
  error

Status in “linux” package in Ubuntu:
  Invalid

Bug description:
  I got now twice that my home directory was gone/mounted read-only
  while testing different VMs in Virtualbox.

  I attached the kernel log where the trouble starts with:
  EXT4-fs error

  .

  Xubuntu 12.04.3

  Linux xubuntu 3.8.0-34-generic #49~precise1-Ubuntu SMP Wed Nov 13
  18:05:00 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

  VirtualBox 4.3.6-91406~Ubuntu~precise
  ---
  AlsaVersion: Advanced Linux Sound Architecture Driver Version k3.8.0-34-generic.
  ApportVersion: 2.0.1-0ubuntu17.6
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  laza      1791 F.... xfce4-volumed
                        laza      1825 F.... pulseaudio
   /dev/snd/controlC0:  laza      1791 F.... xfce4-volumed
                        laza      1825 F.... pulseaudio
  CRDA: Error: [Errno 2] Datei oder Verzeichnis nicht gefunden
  Card0.Amixer.info:
   Card hw:0 'SB'/'HDA ATI SB at 0xfe024000 irq 16'
     Mixer name	: 'Realtek ALC889A'
     Components	: 'HDA:10ec0885,1458a102,00100101'
     Controls      : 56
     Simple ctrls  : 22
  Card1.Amixer.info:
   Card hw:1 'Generic'/'HD-Audio Generic at 0xfdefc000 irq 49'
     Mixer name	: 'ATI R6xx HDMI'
     Components	: 'HDA:1002aa01,00aa0100,00100200'
     Controls      : 7
     Simple ctrls  : 1
  Card1.Amixer.values:
   Simple mixer control 'IEC958',0
     Capabilities: pswitch pswitch-joined penum
     Playback channels: Mono
     Mono: Playback [on]
  DistroRelease: Ubuntu 12.04
  HibernationDevice: RESUME=UUID=84cc1237-7c21-4e93-bd31-709f34e07c78
  InstallationMedia: Xubuntu 12.04.2 LTS "Precise Pangolin" - Release amd64 (20130214)
  IwConfig:
   vboxnet0  no wireless extensions.

   eth0      no wireless extensions.

   lo        no wireless extensions.
  MachineType: Gigabyte Technology Co., Ltd. GA-MA790GP-UD4H
  MarkForUpload: True
  NonfreeKernelModules: fglrx
  Package: linux (not installed)
  ProcEnviron:
   LANGUAGE=de_DE:en
   TERM=xterm
   PATH=(custom, no user)
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-34-generic root=UUID=13b5f178-5167-47f0-bf90-cf9c0e7c0b08 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.8.0-34.49~precise1-generic 3.8.13.12
  RelatedPackageVersions:
   linux-restricted-modules-3.8.0-34-generic N/A
   linux-backports-modules-3.8.0-34-generic  N/A
   linux-firmware                            1.79.9
  RfKill:

  Tags:  precise
  Uname: Linux 3.8.0-34-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo vboxusers
  dmi.bios.date: 07/08/2010
  dmi.bios.vendor: Award Software International, Inc.
  dmi.bios.version: F7c
  dmi.board.name: GA-MA790GP-UD4H
  dmi.board.vendor: Gigabyte Technology Co., Ltd.
  dmi.board.version: x.x
  dmi.chassis.type: 3
  dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
  dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF7c:bd07/08/2010:svnGigabyteTechnologyCo.,Ltd.:pnGA-MA790GP-UD4H:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-MA790GP-UD4H:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
  dmi.product.name: GA-MA790GP-UD4H
  dmi.sys.vendor: Gigabyte Technology Co., Ltd.

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