MacBook 13", late 2008 rev. nvidia-driver/XEN-kernel

I just installed OpenSUSE 11.1 i586 with the XEN kernel and I am trying to get better resolution than 1024x768 (VESA, which is the only one I get to work).

According to the wiki, it should work with plain sax2 config after installing the nvidia driver (I assume it’s the G02 that applies).
Ref.: MacBook - openSUSE

I did not get this working, but I guess that might be because I run a XEN kernel. I added nvidiafb to the INITRD modules and rebuild the initrd’s, but no change. I get “Input/output error” when trying to start/configure X.

Any hints?