[ubuntu] Ubuntu on Nexus 7 Installation Problem...

I recently bought a Nexus 7, was having fun with it, until I heard Ubuntu had a port for it.
So, naturally, I started up my laptop and downloaded the installer, hooked the nexus 7 up in FastBoot mode, and let the installer go.
No errors at all, everything was fine.
Nexus rebooted, did the partition-related stuff, started, and showed the Ubuntu startup screen.
Then... it went black. Here;s what I can gather:
-It's still on, the backlight is on.
-My computer can't recognize it, nor can ADB or Fastboot.
-It's doing nothing.
-There's no way to return to default ROM due to the sheer fact that nothing can read it.
Help? Please?