Thanks for reporting this bug. Some online discussions (i.e. http://comments.gmane.org/gmane.comp.emulators.kvm.devel/84328) suggest that for some hardware under amd interrupt remapping may not be supported? But I don't see any errors to that effect in your output.
Can you show the /var/log/libvirt/qemu/Ubuntu1204beta2-clone.log file contents? ** Also affects: virt-manager (Ubuntu) Importance: Undecided Status: New ** Changed in: qemu-kvm (Ubuntu) Status: New => Confirmed ** Changed in: virt-manager (Ubuntu) Status: New => Confirmed ** Changed in: qemu-kvm (Ubuntu) Importance: Undecided => Medium ** Also affects: libvirt (Ubuntu) Importance: Undecided Status: New ** Changed in: libvirt (Ubuntu) Status: New => Confirmed ** Changed in: libvirt (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/985579 Title: attaching PCI-E HD Radeon 6450 graphic card to Ubuntu12.04 64bit guest fails To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/985579/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs