I read this thread on GPU Passthrough working on Ubuntu 16.04:
http://ubuntuforums.org/showthread.php?t=2320369
And I read the most relevant articles,
including those from
vfio.blogspot.co.uk and
www.pugetsystems.com/labs/articles/Multiheaded-NVIDIA-Gaming-using-Ubuntu-14-04-KVM-585/
*** OS:
(K)Ubuntu 16.04.0 booting from UEFI
***HARDWARE:
i7 6700-k (which supports VT-D)
motherboard AsRock ( Fatal1ty Z170 Gaming ITX ac latest Uefi Version 2.0) which has got both VT-D and Intel Virtualization "enabled".
GTX 970 destined to GPU passthrough with qemu and KVM
intel integrated graphics destinate to the host. (bios primary display setting = "integrated", shared memory="1024MB" )
***PROBLEM:
results in:
however typing:
results in:
no output at all
*** SETTINGS:
I tried with each of these:
always followed by
and reboot, of course.
I need acpi=off in my system, otherwise dmesg shows a ton of warnings that keep growing.
Those warning are not likely to be related to the problem with IOMMU
I also have got the following settings:
On a separate but related topic, I tried to blacklist the GTX 970. I tried to assign vfio-pci directly (as it should have worked since Kernel 4.1), but it did not work. So I used pci-stub. I tried to blacklist the nvidia drivers explicitly, but I still get "Kernel modules: nvidiafb, nouveau":
gives:
http://ubuntuforums.org/showthread.php?t=2320369
And I read the most relevant articles,
including those from
vfio.blogspot.co.uk and
www.pugetsystems.com/labs/articles/Multiheaded-NVIDIA-Gaming-using-Ubuntu-14-04-KVM-585/
*** OS:
(K)Ubuntu 16.04.0 booting from UEFI
***HARDWARE:
i7 6700-k (which supports VT-D)
motherboard AsRock ( Fatal1ty Z170 Gaming ITX ac latest Uefi Version 2.0) which has got both VT-D and Intel Virtualization "enabled".
GTX 970 destined to GPU passthrough with qemu and KVM
intel integrated graphics destinate to the host. (bios primary display setting = "integrated", shared memory="1024MB" )
***PROBLEM:
Code:
dmesg | grep -e DMAR -e IOMMUCode:
[ 0.000000] DMAR: IOMMU enabledCode:
find /sys/kernel/iommu_groups/ -type lno output at all
*** SETTINGS:
I tried with each of these:
Code:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi=off intel_iommu=on "Code:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi=off intel_iommu=on intel_iommu=igfx_off"Code:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi=off intel_iommu=on intel_iommu=igfx_off pcie_acs_override=downstream"Code:
sudo update-grubI need acpi=off in my system, otherwise dmesg shows a ton of warnings that keep growing.
Those warning are not likely to be related to the problem with IOMMU
I also have got the following settings:
Code:
sudo kate /etc/modulesCode:
pci_stub
vfio
vfio_iommu_type1
vfio_pci
kvm
kvm_intelCode:
sudo lspci -s 01: -vCode:
01:00.0 VGA compatible controller: NVIDIA Corporation GM204 [GeForce GTX 970] (rev a1) (prog-if 00 [VGA controller])
Subsystem: NVIDIA Corporation GM204 [GeForce GTX 970]
Flags: fast devsel, IRQ 16
Memory at de000000 (32-bit, non-prefetchable) [disabled] [size=16M]
Memory at c0000000 (64-bit, prefetchable) [disabled] [size=256M]
Memory at d0000000 (64-bit, prefetchable) [disabled] [size=32M]
I/O ports at e000 [disabled] [size=128]
Expansion ROM at df000000 [disabled] [size=512K]
Capabilities: [60] Power Management version 3
Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [78] Express Legacy Endpoint, MSI 00
Kernel driver in use: pci-stub
Kernel modules: nvidiafb, nouveau
01:00.1 Audio device: NVIDIA Corporation GM204 High Definition Audio Controller (rev a1)
Subsystem: NVIDIA Corporation GM204 High Definition Audio Controller
Flags: bus master, fast devsel, latency 0, IRQ 17
Memory at df080000 (32-bit, non-prefetchable) [size=16K]
Capabilities: [60] Power Management version 3
Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [78] Express Endpoint, MSI 00
Kernel driver in use: pci-stub
Kernel modules: snd_hda_intel