Am 21.05.2010 16:29, schrieb Siju George: Hi, This may be a really stupid doubt but still.. I have run x86 vkernel on x86. My doubts are. 1) is it possible to run x86 vkernel on amd64? No, just like you can't run any other i386 binaries on x86_64. However, you can run an x86_64 vkernel of course (VKERNEL64 config). Sascha -- http://yoyodyne.ath.cx