Questions tagged [pci-passthrough]

PCI passthrough allows PCI devices to appear and behave as if they were physically attached to the guest operating system when using KVM and Xen hypervisors.

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VT-d support enabled but IOMMU groups are missing

On a Supermicro A2SDi-8C+-HLN4F Atom C3758 system I see that VT-d support is enabled in the BIOS but I can't find any IOMMU groups under Linux (Fedora 31): $ ls /sys/kernel/iommu_groups $ The kernel ...
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Video output blank on PCI passthrough for QEMU

Ive recently been dunking my head in sulfuric acid, trying to get a GPU to work with QEMU. The screen is first used by the UEFI firmware from boot, but once Arch Linux is loaded it switches to the ...
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PCI passthrough stopped working in (K)ubuntu 20.04 guest, but only after login

I have been using KVM/QEMU for GPU passthrough successfully for over a year now. In my case, I was passing an GTX1070 to linux and an AMD RX480 to Windows. When my Arch installation got messed up, I ...
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Passthrough SATA Controller KVM

Ahoy friends. Currently i use Fedora 31 and KVM to run a few virtual machines, including my storage machine, based on FreeBSD. All the HDDs which are connected to my SATA controller should be passed ...
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Is it possible to passthrough all devices in QEMU/KVM?

I'd like to create an extra execution environment between the OS and the hardware to test something, so I decided to create a small linux environment which only runs a single VM with the primary OS ...
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729 views

Passing a USB device to Qemu KVM

I am trying to get my Windows VM to access my USB pen drive, but I am having problems passing this USB over to the VM. On my Linux host machine, I ran lsusb where my device was identified as Bus ...
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1answer
35 views

Monitor plugged into integrated graphics but use dedicated graphics for rendering games

Is there a way to have the integrated graphics offload to the dedicated graphics card when I want to play a game? I want to leave the dedicated graphics card open for pass through to a Windows VM.
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Second video card for virtual machine with PCI passthrough

I am very new to the PCI passthrough topic. So could you explain some things to me. I have a System with Ryzen 5 1600 and GTX 1060 6GB. I also have a secondary PCIe slot and an old Radeon HD 5700. So ...
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virsh preboot script

I am running a virtual machine that requires vfio access to a PCI card. Using this script I am able to successfully bind the PCI device and its iommu group to vfio-pci, which then lets me boot up the ...
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356 views

Arch Linux stuck at “Loading version 240” after modifying configs

I'm trying to get GPU passthrough to work on a VM. I've been following this video https://www.youtube.com/watch?v=6FI31QDtyy4. The differences between what I did and what he did in the video was ...
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444 views

Passthrough Sonnet USB-C card to Windows guest via KVM and vfio

I am trying to passthrough a USB card to a guest, but I can't seem to make the VFIO driver stick, instead it seems that the host loads and takes over the card. I have a GPU successfully passed through,...
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560 views

Error building virtualbox pci-passthrough kernel module - what went wrong?

I am trying to get virtualbox working on my machine with the pci-passthrough extension. When trying to run a VM, I got this error message: Kernel driver not installed (rc=-1908) [message asking me to ...
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How do I translate between qemu-system arguments and virt-install arguments so I can unify partially working commands?

I am in the process of setting up VFIO with KVM. I have the VFIO itself working, in that the VFIO'd GPU displays the UEFI shell screen when I start the VM. I am also able to create a working Windows ...
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1answer
4k views

difference betweeen passthrough NIC and bridge setup in qemu

I set up a quemu virtual machine using virsh in a way that I pass through my physical USB NIC connected to the host machine directly to the virtual machine. This means that I see my USB NIC in the ...
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VirtualBox iGPU Passthrough

I followed this quick guide to enable PCI passthrough using KVM on Fedora, the main steps are: Enable IOMMU and Virtualization on the motherboard Prevent my device from being grabbed by a module ...
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lsusb lists devices on different PCI controllers under the same USB hub

From what I understand, devices connected to different controllers should show up under different USB busses. However, when I connect a keyboard to the xHCI controller, it is still listed under one of ...
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How to access PCIe bridge devices in VM

I am trying to use PCI pass through to a VM. The host system uses Centos 7.2. The system has several PCIe devices connected behind a fabric of PCIe switches and bridges (typically from PLX). I can ...
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Force Arch boot to specific GPU

Arch Linux - kernel 4.13.12-1 (x64) Bootloader - Grub 2 Window Manager: I3-wm. Gpus: AMD 570 (Passthrough), 1080Ti(Passthrough), 1050TI (Host) Misc: Dual-Monitor I have three GPUs in my machine, ...
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Arch Linux with PCI Passthrough freezes on boot after upgrade

I have been running arch linux with PCI Passthrough for several months now, and just updated a few days ago. When I rebooted, arch always freezes during boot. The only way I can get it to boot is to ...
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1answer
286 views

Can a KVM guest VM's kernel be more recent than its host? (When hardware passthrough is in effect)

If my system requires the latest Linux kernel to run the latest Nvidia proprietary drivers, is it possible for me not to install them on the host? (maybe use the open-source Noveau drivers, or install ...
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466 views

Multi-GPU passthrough to Windows 10 VM fails before booting

I've successfully set up Windows 10 VM with 5 x Nvidia 1080Ti cards passed through, using kvm, libvirt, virt-manager and vfio-pci on Ubuntu 16.04. All working fine. If I attempt to passthrough more ...
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270 views

VFIO cannot be used for the Memory Controller

I am trying to set up a PCI Passthrough of my Audio device in QEMU/KVM. The audio device is in the group 9, together with other three devices: IOMMU Group 9 00:1f.0 ISA bridge [0601]: Intel ...
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Qemu fails to start

So I've been trying to set up GPU passthrough on Arch, but I've ran into a wall. I followed these two guides, mostly the first one though: GPU Passthrough Revisited, Non-root GPU passthrough. I did ...
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High CPU usage when KVM Windows guest plays audio

I'm running a Windows 10 virtual machine as my daily driver, it's running on top of ubuntu server 16.04. GPU and USB expansion card passthrough works just fine but I'm experiencing maxed out host CPU (...
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Is possible to re-add a removed iommu device?

I use pci passthrough. Unfortunately my card is sharing the same irq of an usb controller. I use this procedure: Find the sharing irq, in my case return 21 lspci -s 00:05:00 -vvv Find the irq ...
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Driver for GTX 1080 doesn't work on guest when using KVM PCI Passthrough

I believe we are running into a possible bug with the GTX 1080 (driver) and PCI Passthrough. My host is an Ubuntu 14.04 system. My guest is an Ubuntu 14.04/16.04 system (both do the same thing). I can ...
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1answer
1k views

Why does PCI passthrough not give my device to the guest OS?

I want to try PCI passthrough. I have passed an old capture video card to a Windows XP guest. IOMMU is enabled; vfio_pci is loaded I run this command: virsh nodedev-detach pci_0000_05_05_0 lspci ...
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PCI passthrough device memory access incorrect

I have a wrlinux yocto system running on an Intel Haswell processor. Here we pass through a PCIe device (broadcom switch) to the VM, launched using qemu/kvm. The Guest is able to detect the device via ...
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350 views

Select graphics card

Is there a way to select a primary graphics other than onboard graphics? I have two different dedicated graphics cards in my machine, one GT640 and a GTX970. I am trying to set up the machine to set ...