Actually I now notice the following in your boot log: Please enable the IOMMU option in the BIOS setup
Could you please go into the bios and make sure the IOMMU option is set? -- 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