[Live] XBMCbuntu doesn't load GUI on boot

HI everyone,

I build a new rig today that I want to use as HTPC running XBMCbuntu. I downloaded the latest stable release of XBMCbuntu and put it on a USB3 pendrive with LiLi.
It boots from the pendrive and I see the loading screen, but throws me in a CLI (tty1).
When switching to tty7 I see 1 item that failed:

Ubuntu 12.04 boots just fine using the same ritual.

Specs are:
Motherboard: Asus F2A85-M
APU: AMD A10-5800k
RAM: 2x2GB PC14900 (currently running at 1333Mhz)
No external GPU

Anyone knows how to solve this? Could it be that the current version of XBMCbuntu doesn't support my APU yet?

Thanks in advance.