Does anybody know how to hide pci devices? I have installed the xen package in my ubuntu installation, and im trying to use pciback.hide in my grub entry to hide one of the 3870 gpu's on my ati 3870x2 so that fglrx will recognize it as only one 3870. So far i have added pciback.permissive and pciback.hide=(03:00.0) to the xen listing in grub but still no luck.