Questions tagged [linux-kvm]

Linux Kernel Virtual Machine is a virtualization system (VM)

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QEMU/KVM emulating wacom-tablet

I'm trying to emulate an old machine and have working xserver with absolute input, I've managed to add wacom driver to the guest (and I suppose that's the best I can do). The wacom driver does not ...
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QEMU/KVM emulating vmware graphics

I'm trying to migrate to virtual and old physical machine with nvidia GPU. I've succesfully done it with virtualbox with vmware graphics emulation, worked like charm after some tuning. On the other ...
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how to configure firewalld, port-forward to specific VM:port and permit VM to external

I have KVM/libvirt env as follows. em1(external) | bridge0 / | \ VM1 VM2 VM3 I hope to access to VM1(192.168.122.103) with 9091 port from external with following. # firewall-cmd -...
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KVM / QEMU - Confused by bridge ip address (on Debian host)

I have followed a few guides to getting a bridge setup on my Debian VM host The most useful I found to be this: https://linuxconfig.org/how-to-use-bridged-networking-with-libvirt-and-kvm I have read a ...
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libvirt / KVM/QEMU - Networks: What does “Open Network” do?

When setting up a network with libvirt & virt-manager, there is an option to choose "Open Network" as the "Network Mode" when forwarding traffic to a physical network. What ...
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VM with VLAN trunk on KVM

what exactly do I need to configure on Ubuntu18-based QEMU/KVM server to pass a trunk with >1 VLANs to a VM on it? (basically the equivalent of setting VLAN ID to 4095 on a port with ESXi) Some ...
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Can't connect to a remote host with virt-manager

I'm trying to connect from a laptop (computer1) to a host (remote1). On computer1 I have user1 on the host I have a different user (user2). Both systems are running Debian, the remote1 system is a ...
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Cannot connect to KVM virtual machine using VNC (connection hangs)

I have been able to connect to KVM virtual machine since creation using the following commands. I create a SSH tunnel using ssh admin@10.0.1.2 -L 5903:127.0.0.1:5903 -N -T and then run open vnc://...
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How to emulate Windows 10 on a jetson nano with kvm : which kind of machine type should I use?

I would like to run a vm on my jetson nano,emulating windows 10 with qemu and kvm. As you probably already know,the jetson nano runs on arch64 / tegra platform. As first step I have recompiled the ...
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Arch enable hyper-v features

Got told on Server Fault to post this here. I am running on arch, and want to enable the following hyperv-fearures: vpindex synic stimer reset frequencies But I am running into an issue, where virt-...
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Virtualization server - picking the hardware with multiple host adapter

We have decided to pick two servers (hardware) and dedicate them to kvm virtualization, replicating data from server A to server B using DRBD + LVM (every guest will store its virtual disk into its ...
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QEMU-KVM & CPU/RAM performance

On my brand new machine I have set up QEMU/KVM on Ubuntu 20.04 and I'm running multiple Linux guests without issues. What is causing me some headaches is to get the Windows 10 guest (for gaming) to ...
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How do I pin a process to a single CPU core?

I have a 2 core 2 thread cpu and I want to pin one core for a Windows 10 VM and keep the other for the Linux host.
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Why wont Windows 10 Pro shut down with the ACPI power button when screen is locked locally?

We have Windows 10 running under KVM but it won't shut down when it gets an ACPI power button request triggered by virsh shutdown win10 after a user locks the console---however, it will under the ...
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Is there any way to have my laptop run Windows 10 while having a KVM-Hypervisor under it?

Before I start, I should let you know that my knowledge I have gained so far consists of self-study, so I might not get the correct terminology. I use Windows 10 for all of my productivity work, but I ...
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Running a KVM VM on VirtualBox under Windows?

Is is possible to move a KVM VM (Fedora 33) to VirtualBox on Windows 10?
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Cannot create kvm domain on alpine linux

After installing kvm on alpine following this blog, I cannot create a new virtual machine on alpine, facing 2 problems. domain configuration does not support video model qxl Unable to complete ...
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Oracle VirtualBox for Ubuntu detecting avx & avx2 for one CPU but not the other

I have been looking into this issue for days now. In short, Oracle VirtualBox started supporting avx & avx2 since version 5.0.3. Right now, it's on 6.1.16, so way ahead. I had many problems ...
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I can't mount KVM Virtual Disk '.qcow2' from other Linux Live CD to chroot invalid argument

Hi I have Linux CentOS 7 I create it using Virt-Manger , I boot-up and Linux Distro Live CD Tiny-core 9 to experiment with Linux shell and distro modification chroot I list detected V disks with fdisk ...
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iptables not filtering after applying rules to KVM based virtual machine

I am following this serverfault post as I want the guest Centos7 Virtual Machine to access the internet but have no access to any LAN network. My Host machine is Red Hat 7. Here is the output of ...
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How to add new mouse to KVM guest

Host computer is Red Hat Enterprise Linux Workstation 7.4 and virtual guest is Red Hat Enterprise Linux Client release 5.11. This computer comes with a mouse and keyboard and works. However, when a ...
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Virsh error, Failed to connect socket to '/var/run/libvirt/libvirt-sock': No such file or directory

I am trying to setup KVM, but when running certain wirsh commands like: $ sudo virsh net-define br10.xml or $ sudo virsh pool-define-as debian_pool dir - - - - "/home/$USER/VM" I get this: ...
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Virtual machines resource allocation and management with KVM

I am looking for virtual machines allocation and management with KVM on a host bare metal server. For example, I can find the maximum number of VCPUs using the following command virsh domcapabilities |...
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375 views

How do I import qcow2 VM images in ovirt via Admin Portal?

With oVirt node and engine VM installed, I've added my qcow2 image to the export domain (/nfs/export). I've tried in both the base dir of export domain, and also in the following (where /nfs/export/...
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QEMU/KVM - Getting “Error connecting to graphical console: Error opening Spice console SpiceClientGtk missing” when trying to create a VM

I am trying to create a virtual machine using QEMU/KVM. I am getting an error: Error connecting to graphical console: Error opening Spice console SpiceClientGtk missing I have looked around but ...
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What is the best method or procedure for backup an OS to Proxmox today? [closed]

What is the best method or procedure(or tools) for backup an OS to Proxmox today? let's say about 100 virtual machines are used, for example, 25% are Linux, 25% are Windows, 25% Linux with Postgres, ...
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Unable to run 32bit VM Guests on Ubuntu 20.04

I have an old 17" MacBook Pro that's too old for modern macOS with an intel i7-2720QM CPU. I've installed Ubuntu 20.04 on it, running Linux kernel 5.4.0-52-generic. Try as I might I can't get ...
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Network link becomes dead when using bridge interface in Debian

I have a hypervisor (Kernel-based Virtual Machine) running Debian buster which I recently upgraded from Debian stretch. I use network bridging to share my internet connection (it has two Ethernet ...
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118 views

Why my VM is more slow after hardware upgrade?

Old Host centos 8 : old cpu : AMD Ryzen 3 2200g Quad-core (4 Core, 4 Threads) 3.50 Ghz Processor old ram : 2 x Corsair 8 GB Vengeance LPX DDR4 2400MHz SATA 3 SSD Guest : microsoft windows pro ( ...
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Running KVM on a Ubuntu 18.04 server with a bridged network

I have a KVM system running on an Ubuntu 18.04 server with the networking bridged to enable connectivity to the guests from the outside network. The problem I am running into is that the guests do not ...
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829 views

VM Installation - libvirt.libvirtError: internal error: qemu unexpectedly closed the monitor

when I try to create my VM in Manjaro, I am getting this error. Unable to complete install: 'internal error: qemu unexpectedly closed the monitor: 2020-10-29T14:25:27.745918Z qemu-system-x86_64: ...
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287 views

Virt-Manager and iPhone USB redirection

I have a Mac virtual machine installed using QEMU/KVM and I can't redirect my phone to the virtual OS. It keeps saying: spice-client-error-quark: Could not redirect ... at 1-13: Device is in use by ...
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Allow Windows KVM Guest to Access Kubuntu Host Filesystem

I am trying to get my Windows Qemu KVM to be able to access the host Kubuntu filesystem, so that I can work with files on Linux and Windows at the same time. I tried looking for various guides online, ...
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Connect with SSH to Linux KVM guest during installation

During installation of a KVM guest OS, it's possible to connect to the system console via VNC and interact with the installer system during some phases of installation for example using the shell. For ...
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Running a single vm on hypervisor or kvm over a distributed clusture

I know somewhat about Beowulf cluster and linux virtual server. But I want to know if there exist a way to run an os on two or more nodes in cluster-unware mode. I mean the os will just seet the total ...
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477 views

getting Error message while trying to install KVM vm from terminal, host machine is ubuntu20.04

so in the past when i was installing vms in kvm, i was using kvm GUI, but now i want to install virtual machine from terminal, this is what i tried to do: virt-install --network bridge:virbr0 --name ...
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Remote access to 20.04 locks window manager after a few minutes being idle

I have a ubunutu 20.04 VM running on a KVM server. The KVM server is on an updated ubuntu 20.04 system. The VM is basically an unmodified version that was just downloaded and updated. Added x2go so ...
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How do I correctly set up a headless virtual machine with kvm?

I am trying to install openSUSE virtual machines on a Celeron J3160-based host machine also running openSUSE. It has four NICs, of which I have bridged three - one for each guest VM. Originally when ...
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QEMU/KVM: Creating file sharing between Linux host and MacOS guest

I would like to create whatever possible way to enable file sharing between my Ubuntu 20.04 host and a MacOS Mojave running QEMU/KVM. Things I've tried: anything related to virt-manager. Doesn't work ...
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QEMU: CPU topology doesn‘t match maximum vcpu count

Problem: The definition of a created vm for use with virt-manager fails. Error message: "error: Failed to define domain from macOS.xml error: unsupported configuration: CPU topology doesn't ...
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377 views

How to get IPv6 for libvirt/kvm guests on laptop via both wired and wifi?

How can I get KVM/libvirt guests to have transparent, global IPv6 access on a laptop that switches interfaces between wired and wireless? I have a /56 from my ISP, my unifi gateway gets that ...
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480 views

Installing Windows virtualization features within KVM virtual machine causes early-boot guest crash

See updates below for what I've discovered about the more general nature of this problem. I have a Windows VM running OVMF firmware with VFIO passthrough for a graphics card running on an Arch Linux ...
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46 views

How to upgrade a Windows XP vm in KVM to Windows 7?

I have found plenty of information online for installing either Windows XP or Windows 7 [1] vm, but my Windows 7 license is only for upgrade, which requires that Windows XP already be installed. Is ...
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Is KVM performance for Windows guests significantly worse then other hypervisors?

I use KVM extensively to run Linux VMs, and have occasionally used it to run Windows, but not heavily. A new acquaintance who should know advised me that KVM performs really badly under Windows (with ...
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System interrupts/DPC/ISR appear to be causing sound distortion in Windows 10. How can I determine the root cause?

I am having problems with audio distortion in Windows 10, but it varies in severity between apps. Foobar2000 is very heavily distorted on most tracks, with buzzes and skips. Windows Media Player also ...
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How to boot a UEFI image from a KVM virtual machine without `virt-manager`? (e.g. Home Assistant on OpenMediaVault/Cockpit)

Background I would like to run Home Assistant (HASS) in a virtual machine on OpenMediaVault 5. Up until OMV 4, this was easy because OMV (and the underlying Debian) supported VirtualBox and VB ...
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851 views

KVM/QEMU: Virt manager put automatically EPYC-IBPB cpu in cpu configuration

I have a problem with virt manager. When I tick "copy host configuration" or write host-passthrough" and I start the VM, the CPU model returns automatically to EPYC-IBPB CPU. And if I ...
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82 views

Do CPU cores within VMs benefit from hardware-based encryption?

I am running Proxmox and some VMs on it. I want to set up an nginx proxy that would take care of SSL offloading for all of my services. I am wondering if running it on one of the VMs would mean there ...
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KVM Guest VM (ubuntu) cannot access internet

This might be common issue and I have tried many things and still no luck and looking help here. I have look similar issue here but none resolve, please advise. My kvm vm guest cannot access internet. ...
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Some devices not getting IP from DHCP after adding bridge to server for VMs

I have a server that serves my office and home. For office work I have just added some VMs (one for MySQL and one for WWW and PHP). The server has isc-dhcp-server providing IPs for most devices on the ...

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