Comment 15 for bug 1012627

It works again after purgin apparmor - I mentioned earlier some doubts that it may have to do (also) with usb support in the virtual machine: In my last test (when posting results of "apport-collect -p apparmor 1012627") usb support was (and still is) disabled.

It is completely reproducable that having apparmor installed causes the issue and removing it solves the problem.

Of course uninstalling apparmor is not the desired solution.

Note: The apport-collect result was collected after reboot as I couldn't either switch to a text console anymore after the freeze. Interestingly the machine still responded to a ping from another machine but an attempt to do an ssh session from remote to the machine caused the remote terminal to hang either (maybe just waiting for a timeout but I canceled the attempt after about 30 seconds).

Hope this helps to identify the issue. BTW: Thanks for the quick response to my bug report.