Hello, I am on latest kernel 3.12.6-1-ARCH with xen 4.3.1-2 with an i7-3820 and Asus P9X79 Deluxe with 16GB ram. I have 2 graphics cards, an EVGA 9800GT and an Asus GTX660 Ti. I want to passthrough the 660 to a win 7 domain. The problem is that whatever I do (pciback or pci-stub), nouveau detects the 660 normally and when I try to unbind it throws up a kernel panic. What I did with pci-stub: added pci-stub to Modules in mkinitcpio added pci-stub.ids=my:id With pciback: The same steps with pci-stub... A solution is to blacklist nouveau, but I want X server running on my 9800 (Arch on two monitors and windows to the other). Another problem I faced when I blacklisted nouveau, is that the domain is created, but I can only see output on VNC and not on the attached monitor, but it could be that I booted from windows CD (not installed system). not sure. I would be glad if anyone has advice on how to make xen work with nvidia propriety drivers (for 3d acceleration), but that's not my main problem right now. I think that a lot of people have run to the same problem (but googling did not help....), and that's why I'm using the mailing list. Thank you.