It is a great pleasure to know that is it working for you :) I've just updated the patchs sent by 'JavMV' on May 2011. Even if I'am not a Xen Developer it will be a great idea if a real Xen Developer takes care of the patchs to improve it for Xen 4.2. The next step was to understand how the patch for 'tools/firmware/hvmloader/acpi/dsdt.asl' works. Once I've understood, I've patched for my own graphic card. That's all. For my information, what kind of NVIDIA graphic card do you have? GT 430?GT 440, GTX? Supporting  several cards?I do not know how to do. My feeling is that using the same kind of manufacturer graphic card would be possible because qemu-dm could only support one kind of VGA BIOS. I know that in 2009 a patch was done to support more cards but I've tryid to updated it. ________________________________ De : komkon555 À : xen-devel@lists.xensource.com Envoyé le : Mercredi 7 Septembre 2011 14h26 Objet : Re: Re : Re : [Xen-devel] Re: Patches for VGA-Passthrough XEN 4.2 unstable Perfect, with the latest fixes and configurations it works! I can run dxdiag and see all tests functional. Important is, that cuda-programming is also functional (is what I exactly need). Thank you a lot! The next problem is how to pass through the second (third, fourth) nvidia card to the next one Windows-VM?  For me is most impotent to get 4 separate CUDA/OpenCL programming areas.  Have you any ideas? Tanks Komkon555 -- View this message in context: http://xen.1045712.n5.nabble.com/Patches-for-VGA-Passthrough-XEN-4-2-unstable-tp4406265p4778339.html Sent from the Xen - Dev mailing list archive at Nabble.com. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel