update system requirements in readme

README.md

@@ -22,16 +22,17 @@ This project is looking for maintainers, please see [GH-375](https://github.com/
 ## Requirements
 
 * [Vagrant 1.5+](http://www.vagrantup.com/downloads.html) (tested with 1.7.2)
-* lxc 0.7.5+
+* LXC >= 1.0.0
+* Linux kernel >= 3.13
 * `redir` (if you are planning to use port forwarding)
 * `brctl` (if you are planning to use private networks, on Ubuntu this means `apt-get install bridge-utils`)
-* A [kernel != 3.5.0-17.28](https://github.com/fgrehm/vagrant-lxc/wiki/Troubleshooting#wiki-im-unable-to-restart-containers)
 
 The plugin is known to work better and pretty much out of the box on Ubuntu 14.04+
 hosts and installing the dependencies on it basically means a `apt-get install lxc lxc-templates cgroup-lite redir`
-(older LXC versions like 0.7.5 shipped with Ubuntu 12.04 by default might require
-[additional configurations to work](#backingstore-options)). For setting up other
-types of hosts please have a look at the [Wiki](https://github.com/fgrehm/vagrant-lxc/wiki).
+
+The Ubuntu 12.04 package repositories provide LXC 0.7.5, which is too old. See the [official PPA](https://launchpad.net/~ubuntu-lxc/+archive/ubuntu/stable)
+for updated packages that are compatible with this plugin. You will also need the `linux-hwe-generic`
+kernel package. For setting up other types of hosts please have a look at the [Wiki](https://github.com/fgrehm/vagrant-lxc/wiki).
 
 If you are on a Mac or Windows machine, you might want to have a look at [this](http://the.taoofmac.com/space/HOWTO/Vagrant)
 blog post for some ideas on how to set things up or check out [this other repo](https://github.com/fgrehm/vagrant-lxc-vbox-hosts)