Whaat. Bad Address? I've browsed the source code today and haven't seen that kind of error message. Tell us your full hardware spec, and kernel command line. <div class="gmail_quote">On Sep 17, 2015 11:57 PM, "Karsten Elfenbein" <<a href="mailto:karsten.elfenbein@gmail.com">karsten.elfenbein@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi, after my first tries in <a href="http://lists.nongnu.org/archive/html/qemu-discuss/2015-09/msg00003.html" rel="noreferrer" target="_blank">http://lists.nongnu.org/archive/html/qemu-discuss/2015-09/msg00003.html</a> I did an other round of tests. I made the GF460 the primary card and put the GF970 into vfio. With that config the VM could start and use the card multiple times without rebooting. (vfio is chowned to me) The only bad output I get from qemu while running the gf970 in the VM is: qemu-system-x86_64: vfio_pci_write_config(0000:06:00.0, 0x418, 0xe0000, 0x4) failed: Bad address Then I switched back to the GF460 for the VM and get some more of these lines: qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x13c, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_write_config(0000:03:00.0, 0x13c, 0x3ffffff2, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x150, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_write_config(0000:03:00.0, 0x150, 0xfffffff2, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_write_config(0000:03:00.0, 0x48c, 0x118008c, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x45c, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_write_config(0000:03:00.0, 0x45c, 0xfffffff2, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x158, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_write_config(0000:03:00.0, 0x158, 0xfffffff2, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_write_config(0000:03:00.0, 0x610, 0x5, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_write_config(0000:03:00.0, 0x418, 0xe0000, 0x4) failed: Bad address The second boot looks the same but the card does not bring a signal. (not even the card bios comes up) Installing the Nvidia driver with the GF460 crashed the Windows 10 VM with more if these lines: qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x60c, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x610, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x138, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_write_config(0000:03:00.0, 0x138, 0xfffffff2, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x460, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x460, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x150, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x18c, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x4a8, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x4a4, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x138, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_write_config(0000:03:00.0, 0x138, 0xf007fff2, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x460, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_write_config(0000:03:00.0, 0x460, 0xfffffff2, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_write_config(0000:03:00.0, 0x138, 0xfffffff2, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x4a8, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x4a4, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x4a8, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x4a4, 0x4) failed: Bad address qemu-system-x86_64: vfio_pci_read_config(0000:03:00.0, 0x4a8, 0x4) failed: Bad address Just wondering if it is possible to get the card running or better to just grab a GF950. Thanks Karsten _______________________________________________ vfio-users mailing list <a href="mailto:vfio-users@redhat.com">vfio-users@redhat.com</a> <a href="https://www.redhat.com/mailman/listinfo/vfio-users" rel="noreferrer" target="_blank">https://www.redhat.com/mailman/listinfo/vfio-users</a> </blockquote></div>