Ryzen GPU passthrough Fedora 26 host - Xubuntu 17.04 guest system freeze on shutdown


I followed this guide to set up a windows 10 guest and everything worked fine (finally):

Next I wanted to get a Xubuntu 17.04 guest also working with GPU passthrough and everything seems to work fine too, but if I shutdown the VM, the guest and the host freezes. It looks like it can’t release the GPU on shutdown but I don’t know why. Similar results for a Ubuntu 16.04 LTS and Fedora 26 Workstation guest.

Anyone here with a working linux guest using GPU passthrough with a similar system?
Maybe someone can tell me how I have to configure everything?
Is Q35 and UEFI fine for GPU passthrough on Linux guests?

Asus Prime x370-Pro (Bios 0810 with AGESA update
AMD Ryzen 7 1700
GPU 1: AMD 6450 in Slot 1
GPU 2: AMD RX 460 in Slot 2 (Passthrough GPU)

What I did so far:
I activated SVM and IOMMU in the UEFI, then I have installed Fedora 26 Workstation.
Next I did the following:

sudo dnf update
sudo dnf install @virtualization
sudo dnf install nano

sudo nano /etc/default/grub
added “iommu=1 amd_iommu=on rd.driver.pre=vfio-pci” to GRUB_CMDLINE_LINUX

sudo nano /etc/modprobe.d/kvm.conf
checked if kvm_amd nested=1 and kvm_intel nested=1 are not activated

sudo nano /etc/modprobe.d/vfio.conf
set the ids (got them by using the bash script) of the GPU to passthrough (GPU 1)
options vfio-pci ids=1002:67ef,1002:aae0

sudo nano /etc/dracut.conf.d/vfio.conf
add_drivers+=“vfio vfio_iommu_type1 vfio_pci”

sudo dracut -f --kver `uname -r`
sudo grub2-mkconfig -o /etc/grub2-efi.cfg

There is no error for the two commands above, so I restarted as the guide says, but I get the following two errors:
[0.205289] ACPI Error: Needed [Integer/String/Buffer], found [Region] ffff98bb6e16e000 (20170303/exresop-424)
[0.205296] ACPI Exception: AE_AML_OPERAND_TYPE, Could not execute arguments for [IOB2] (Region) (20170303/nsinit-412)

Changes on default configuration:

  • Firmware: UEFI x86_64
  • Chipset: Q35


  • Configuration: Copy host CPU configuration

Boot Options:

  • Boot device order: Enable boot menu and select VirtIO Disk 1 and SATA CDROM 1

VirtIO Disk 1:

  • Performance options: Cache mode writeback


  • Disk Bus: SATA

Controller USB:

  • Model: Usb 3


  • Tablet
  • Display Spice
  • Console
  • Channel spice
  • Video QXL
  • USB Redirector 1
  • USB Redirector 2


  • 2nd Mouse and Keyboard as USB Host Device
  • Passthrough GPU (and its audio) as PCI Host Device

Finally working…
I used the Chipset i440FX, but as far as I read just Q35 supports PCIE passthrough and i440FX only PCI passthrough.

Someone got this working too?
For some reason my VM is still running if I save my state to the disk…