Summary:
-------

There are problems if frame buffer is enabled in the first
kernel irrespective of if vga= is specified for second kernel
or not.

Wehereas if frame buffer is enabled only for second kernel, 
then kexec succeeds but there is no frame buffer in the second
kernel boot.

More details in the fastboot thread

http://marc.theaimsgroup.com/?l=osdl-fastboot&m=112317395603816&w=2