Vagrant 无法启动流浪lxc

我正试图在Ubuntu 14.04上启动vagrant lxc。我使用的是最新的Vagrant下载（而不是Debian repos中的古老版本）

成功运行，如下所示：

vagrant init fgrehm/precise64-lxc

我跑

处理所提到的sudo问题。 但是当我跑的时候

vagrant up --provider=lxc

（带和不带sudo）容器未装载，吐出以下内容：

> Bringing machine 'default' up with 'lxc' provider...
==> default: Checking if box 'fgrehm/precise64-lxc' is up to date...
==> default: Setting up mount entries for shared folders...
    default: /vagrant => /home/ubuntu
==> default: Starting container...
There was an error executing ["sudo", "/usr/local/bin/vagrant-lxc-wrapper", "lxc-start", "-d", "--name", "ubuntu_default_1456156125505_47833"]

For more information on the failure, enable detailed logging by
setting the environment variable VAGRANT_LOG to DEBUG

下面是我得到的日志输出（来自/var/log/lxc/ubuntu\u default\u 1456156125505\u 47833.log）：

知道我做错了什么吗？ 谢谢，

进入

/home//.vagrant.d/box/fgrehm/precise64 lxc/../lxc/lxc config

文件和 点评：

lxc.pivotdir=lxc\u putold

do

vigrant up

再次启动，它应该可以工作

vagrant up --provider=lxc

> Bringing machine 'default' up with 'lxc' provider...
==> default: Checking if box 'fgrehm/precise64-lxc' is up to date...
==> default: Setting up mount entries for shared folders...
    default: /vagrant => /home/ubuntu
==> default: Starting container...
There was an error executing ["sudo", "/usr/local/bin/vagrant-lxc-wrapper", "lxc-start", "-d", "--name", "ubuntu_default_1456156125505_47833"]

For more information on the failure, enable detailed logging by
setting the environment variable VAGRANT_LOG to DEBUG

lxc-start 1456158555.539 ERROR    lxc_start - start.c:lxc_spawn:884 - failed initializing cgroup support
  lxc-start 1456158555.568 ERROR    lxc_start - start.c:__lxc_start:1121 - failed to spawn 'ubuntu_default_1456156125505_47833'
  lxc-start 1456158555.568 ERROR    lxc_start_ui - lxc_start.c:main:341 - The container failed to start.
  lxc-start 1456158555.568 ERROR    lxc_start_ui - lxc_start.c:main:343 - To get more details, run the container in foreground mode.
  lxc-start 1456158555.568 ERROR    lxc_start_ui - lxc_start.c:main:345 - Additional information can be obtained by setting the --logfile and --logpriority options.