I tried on another machine with apparmor enabled where it worked until the updates were applied (including kernel update from 3.2.0-23-generic- pae to 23 to 253.2.0-25-generic-pae.
Then it began to happen - first once it worked, once not after changing several virtualbox settings (including USB support, disabling hostonlyadapters etc). But then happened again. Finally I found the following ticket on virtualbox site: https://www.virtualbox.org/ticket/10528 Now it works on both machines, so the reason is/was in the kernel and not apparmor or whatever other package. ** Bug watch added: Virtualbox Trac #10528 http://www.virtualbox.org/ticket/10528 ** Description changed: - 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! + Starting 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). + Issue initially noticed running VirtualBox 4.1.16 r78094 (from the Oracle repository). + Problem tends to first appears only now and then, then more often, not always reproducable. 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) - --- + --- ApportVersion: 2.0.1-0ubuntu8 Architecture: i386 DistroRelease: Ubuntu 12.04 InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423) Package: apparmor 2.7.102-0ubuntu3.1 PackageArchitecture: i386 ProcKernelCmdline: BOOT_IMAGE=/boot/vmlinuz-3.2.0-24-generic-pae root=UUID=86a17a66-9a2f-471c-b8a7-ad960f3034e3 ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 3.2.0-24.39-generic-pae 3.2.16 Tags: precise Uname: Linux 3.2.0-24-generic-pae i686 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo vboxusers ** Tags added: freeze -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1012627 Title: virtualbox causes system to lockup To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/virtualbox/+bug/1012627/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
