This issue is back again for me, I have not changed any virtualbox.* package or virtualbox related configuration. I think it's related to upgrade of other package. Friday virtualbox was working as usual, I launched it today and the bug reappeared. I have put as attachment all the package upgrades I have done in this period.
** Attachment added: "upgrated-packages.txt" http://launchpadlibrarian.net/18234203/upgrated-packages.txt -- [intrepid] failed to power virtual machine message "spawning session..." freeze https://bugs.launchpad.net/bugs/272064 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs