Xen fails to boot with no messages
I am trying to install Xen 4.1.2 on Linux 3.2.7-1.fc16.x86_64. However, whenever I pick Xen from GRUB2 menu, Xen would try to boot briefly, but then fails and restart the computer. There is no messages in /var/log/messages, and the booting screen disappears too fast for me to read anything. I have tried to remove 'rhgb' and 'quiet' while adding 'noreboot', but it only leads to a blank screen. Since I am working on a laptop, there is no serial port to connect to booting Xen.
Does anyone has any suggestion for this?