I am trying to test ArchLinux with Pantheon on a VM on VirtualBox.
I am able to install ArchLinux and pacman -S the following packages succesfuly:
- xorg-server
- xorg-server-utils
- virtualbox-guest-utils
- pantheon-session-bzr
- lightdm-pantheon-greeter-bzr
The next step I take is to edit my /etc/lightdm/lightdm.conf to change my greeter_session= to lightdm-pantheon-greeter, but it is not working. This is what I get when I start lightdm:

This screen does not capture any input and after a while stops responding, and some elements are missing.
What am I doing wrong?
I do have 3D acceleration on in my VM settings.