I had the following problems:

  • System did not start with 4GB (1x1GB) Memory installed. I even did not get a beep or anything on the screen.
  • When booting a xen enabled Kernel i got the error message:
CPU 1 FATAL TRAP 13
ERROR CODE 0000, IN INTERRUPT CONTEXT


The resolution is simple: Update your Bios from F1 to F3A (or newer?)

Another Bios update to Version 3 added full virtualisation support to the bios menu. Now i can use unmodified guests in xen.