Hello guys,

I have a problem when using my MSI R9 380 4G graphic card as GPU passthrough with KVM.

At the first linux boot (Fedora 23) I am able to successfully start virtual machine and it works!

However if i will shut down virtual machine and start it again - the screen will stay blank!

So far I have been able to find on the internet that some graphic cards just can not reinitialize itself when there is no power off/on, which could be the case of mine as well.

Also I am very much surprised that this graphic card has no UEFI rom!

Any help would be appreciated

[root@brutus-coreos ~]# virsh start winos1

Domain winos1 started

dmesg output after second boot of the virtual machine winos1

[ 338.346776] input: Microsoft Microsoft® Nano Transceiver v2.0 as /devices/pci0000:00/0000:00:14.0/usb1/1-10/1-10:1.0/0003:045E:0800.0007/input/input23

[ 338.397715] hid-generic 0003:045E:0800.0007: input,hidraw0: USB HID v1.11 Keyboard [Microsoft Microsoft® Nano Transceiver v2.0] on usb-0000:00:14.0-10/input0

[ 338.402847] input: Microsoft Microsoft® Nano Transceiver v2.0 as /devices/pci0000:00/0000:00:14.0/usb1/1-10/1-10:1.1/0003:045E:0800.0008/input/input24

[ 338.403605] hid-generic 0003:045E:0800.0008: input,hidraw1: USB HID v1.11 Mouse [Microsoft Microsoft® Nano Transceiver v2.0] on usb-0000:00:14.0-10/input1

[ 338.419310] input: Microsoft Microsoft® Nano Transceiver v2.0 as /devices/pci0000:00/0000:00:14.0/usb1/1-10/1-10:1.2/0003:045E:0800.0009/input/input25

[ 338.470855] hid-generic 0003:045E:0800.0009: input,hiddev0,hidraw2: USB HID v1.11 Device [Microsoft Microsoft® Nano Transceiver v2.0] on usb-0000:00:14.0-10/input2

[ 754.055255] vgaarb: device changed decodes: PCI:0000:01:00.0,olddecodes=io+mem,decodes=io+mem:owns=none

[ 754.087966] xhci_hcd 0000:00:14.0: remove, state 4

[ 754.087982] usb usb2: USB disconnect, device number 1

[ 754.090201] xhci_hcd 0000:00:14.0: USB bus 2 deregistered

[ 754.090399] xhci_hcd 0000:00:14.0: remove, state 1

[ 754.090409] usb usb1: USB disconnect, device number 1

[ 754.090413] usb 1-2: USB disconnect, device number 2

[ 754.090964] usb 1-8: USB disconnect, device number 3

[ 754.091904] usb 1-10: USB disconnect, device number 4

[ 754.222281] xhci_hcd 0000:00:14.0: USB bus 1 deregistered

[ 755.359725] vfio_ecap_init: 0000:01:00.0 hiding ecap 0x19@0x270

[ 755.359733] vfio_ecap_init: 0000:01:00.0 hiding ecap 0x1b@0x2d0

[ 755.384598] vfio-pci 0000:03:00.0: enabling device (0000 -> 0002)

[ 755.485743] vfio_ecap_init: 0000:03:00.0 hiding ecap 0x1e@0x154

screen is blank - I have to reboot my Linux machine in order to be able to start this virtual machine once again

David Hlacik

+420-777-307-745 | david@hlacik.cz