NetBSD 5.0, native Xorg and Xinerama - RandR

[Pierrick Brossin <pierrick%bs-network.net@localhost>]

Hello,

tech-x11 was not able to answer my question. This is why I am sending my 
question again but on netbsd-users this time :-)

I am having a problem with the native version of Xorg on NetBSD 5.0
My computer has two graphic cards. A GeForce 9300 and a Radeon 9200.
This setup works correctly and window manager (fluxbox) starts twice 
(once on each screen).
I wanted to enable Xinerama but X is not showing up. It seems it crashes 
after trying to enable RandR on the ATI card (I can provide a Xorg log 
file if required).
I thought RandR was disabled when Xinerama was enabled.

Any idea what I can do ?

Thank you

Pierrick