I'm confused as to why you reported this bug against lxc in ubuntu. Were you running vagrant+virtualbox inside an ubuntu lxc container?
** Package changed: lxc (Ubuntu) => cloud-images -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to lxc in Ubuntu. https://bugs.launchpad.net/bugs/1598108 Title: ubuntu/xenial64 slow sstart Status in cloud-images: New Bug description: host system: mint 18, virtualbox 5.0.24-108355~Ubuntu~xenial, Vagrant 1.8.1 Steps to reproduce % vagrant init ubuntu/xenial64; vagrant up --provider virtualbox Expected behavior: system starts 5-7 seconds Current behavior: system starts about 90 seconds. most of the time system booting kernel. in the main directory appears a log file with boot log To manage notifications about this bug go to: https://bugs.launchpad.net/cloud-images/+bug/1598108/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp