Comment 0 for bug 1012627

With the update of apparmor v2.7.102 from today morning (at least that was when it popped up to me, beeing in GMT+2) starting (at least windows 2008r2) virtual machines in virtualbox locks up the system completely! Hardware reset required (no CTRL+ALT+F1 etc available any more)!

Issue initially noticed running VirtualBox 4.1.16 r78094 (from the Oracle repository).

Tried the following:
a) Uninstalled VirtualBox 4.1.16, rebooted, installed 4.1.12 from the universe repositories - same issue - so is not related to latest Oracle release of VirtualBox.
b) Tried using Ubuntu 2D desktop environment because I feared it was a kind of Unity lockup - same issue - so does not seem to be Unity related.

The only way I could resolve the issue was:
sudo apt-get purge apparmor
reboot

I was hit in a sudden by this bug after shutting down my laptop, leaving to office and there I could not start any virtual machine any more which worked until in the morning. Thinking of possible changes I remembered that I installed an update popping up right before shutting down.

The problem is for me reproducable as soon as I reinstall apparmor and reboot.
Trying to start any of the Windows 2008r2 virtual machines (don't know if occurs also with other guests, I only have Win2008r2 VMs) - after a few seconds everything locks up.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: apparmor (not installed)
ProcVersionSignature: Ubuntu 3.2.0-24.39-generic-pae 3.2.16
Uname: Linux 3.2.0-24-generic-pae i686
ApportVersion: 2.0.1-0ubuntu8
Architecture: i386
Date: Wed Jun 13 13:17:29 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
SourcePackage: apparmor
UpgradeStatus: No upgrade log present (probably fresh install)