crash at booting Ubuntu 12.04 "end trace..."

Hello

I booted my desktop Ubuntu 12.04 64bit but didn't watch it. Later the monitor was packed with lines of information and the last line saying:
481.465700] ---[ end trace b3a4129e65da3549 ]---
(Photo of the screen is available.)

When nothing else happend I turned the desktop off.
Restarted with no success.
Booting from live cd not possible.
No reaction on the monitor.

Until know I could at least boot from the live cd. But not this time.(lol)

I use the oracle virtualbox for Windows and MS Office.
I also had some problems with the FCEUX NES Emulator.

So I am quiet not sure what caused the problem.

Ronnie