hallo according to the this message: https://www.redhat.com/archives/fedora-test-list/2007-February/msg00602.html i currently don't know what you mean with "...IRQ changes...", but i have 2 bugs open related to b44 and X (mga550) with xen. waiting on a 1.2911.6.4 xen-kernel... ronald (be aware: my english is bad)