Questions tagged [linux-kvm]

Linux Kernel Virtual Machine is a virtualization system (VM)

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Possible to move a guest OS on VirtManager (Linux) to Windows?

For VirtualBox or VMware Workstation,one could copy the guest OS data directory to another computer and run it there. For example, I could create a guest OS on Linux, and then copy the guest data ...
Damn Vegetables's user avatar
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1 answer
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Does IP required for bridge interface in KVM host

We have a requirement to configure bridge on SLES host and add it for KVM guest as bridge mode for public IP. In this case, Is it mandatory to have ip on the bridge interface of the SLES host
MOBIN TM's user avatar
1 vote
1 answer
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Unable to load Nvidia drivers in QEMU virtual machine

I have an Ubuntu Server 20.04 LTS on an Alienware Aurora R6 (i7-7700 CPU with a Nvidia GTX 1080). I am relatively new to type-1 hypervisor and have some experience with type-2 (VirtualBox). On the ...
rbaleksandar's user avatar
1 vote
2 answers
517 views

Task manager showing absurdly high network throughput in VM

I've got an instance of Windows 10 running in a KVM instance and the task manager in it shows ridiculously high total network throughput (150-900 Gbps upload and download on a 1Gbps link). Has anyone ...
user2209743's user avatar
2 votes
1 answer
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No Internet on Linux KVM Windows 10 guest using VirtIO drivers

I'm attempting to install a Windows 10 VM using QEMU/KVM in virt-manager. I want to use it for a WinApps setup to do some experiments with Adobe CC in Linux. I've been following several guides ...
IneptusMechanicus's user avatar
2 votes
0 answers
966 views

FreeDOS as DOSBox replacement

Generally when the question about DOS games flares up, the general consensus is to use DOSBox (or DOSBox Staging) and it usually does the job. However, as a proof of concept I wonder if it would be ...
Phoenix's user avatar
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virt-manager - spice-guest-tools not working on Windows 10 guest

Host: Debian Bullseye Guest: Windows 10 20H2 Hypervisor Details: Hypervisor: KVM Architecture: x86_64 Emulator: /usr/bin/qemu-system-x86_64 Chipset: Q35 Firmware: BIOS Windows in the VM is running ...
Enter Display Name Here's user avatar
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548 views

NAT with iptables does not work from within a VM

I use Proxmox on a Debian 11 host with two public IP addresses. One ip gets bridged to a virtual machine (VM1) via vmbr0. For another machine (VM2, IP 192.168.10.2) I want to use NAT to get internet ...
DaBrot's user avatar
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Enabling SSSE3 flag on a VM running on KVM

How do I forward the SSSE3 flag from my host server to VM while using KVM? I tried the following. My QEMU version is qemu-kvm-1.5.3. My host server has the SSSE3 flag enabled (output cut for brevity): ...
asm_nerd1's user avatar
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1 answer
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KVM 3.1.1 installation

I have a requirement to install KVM 3.1.1 on RHEL7 or 8. When I am checking I found that qemu-kvm is automatically installed on RHEL8 and the version is 4.2. It would be great if anyone can share the ...
MOBIN TM's user avatar
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1 answer
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KVM-QEMU + Libvirt - CPU Pinning

I would like to ask, if it is possible to reserve cores just for particular VM's and prevent others to use them. Let me explain closer: I'd like to have 2 virtual machines to be pinned to cores 0-7 ...
Fis's user avatar
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1 vote
1 answer
6k views

kvm/virt-manager boot selection

I have a VM with two virtual disks. Each have windows OS (w10 and upgraded, same W10 to W11). I cannot separate them to 2 VMs, because I'll loose the activation on one of them. I have enabled boot ...
user63726's user avatar
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0 answers
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Ubuntu running on vmware-kvm with Dual Screens

I'm trying to find a way to use Ubuntu 64-bit on vmware-kvm.exe with dual screens. Ubuntu runs perfectly fine but I can't use my two monitors unless I use VMware workstation player. I've been ...
MatGeneral's user avatar
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1 answer
1k views

Virtual machine Windows 10 unmountable boot volume error

I'm running Windows 10 through KVM and virt-manager. Today, I'm receiving a BSoD along with error: Unmountable boot volume Then, the screen shows automatic repair preparation: Then, a black screen ...
Megidd's user avatar
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1 answer
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Boot virtual Windows 10 KVM from physical machine

I have a Windows 10 QEMU/KVM setup whose virtual disk is in qcow2 format. I would like to boot my physical machine using this virtual disk. Is it possible to write the content of this virtual disk to ...
Alex's user avatar
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1 vote
1 answer
5k views

Is it possible to install KVM in WSL 1?

I have WSL 1 installed on my Windows 10 machine in which Ubuntu 20.04 is installed. My CPU supports hardware virtualization. I followed instructions here to try to install KVM, but when I run "...
zzzhhh's user avatar
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4 votes
1 answer
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QEMU aarch64 on ARM Mac never boots and only shows (qemu) prompt

I'm trying to emulate aarch64 and/or arm using qemu on ARM/M1 macOS. However, after multiple installer isos (ubuntu aarch64, standard alpine aarch64, etc) I can't seem to get anything but a blank ...
Oxcug's user avatar
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0 answers
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Make a QEMU+KVM guest export USB mass storage to host?

So I'm really wondering if you can use a QEMU+KVM guest as a USB device. I'm really just playing around and have no very clear use-case for it. But one imaginable thing is to setup the guest so that ...
Jo-Erlend Schinstad's user avatar
1 vote
1 answer
627 views

Why is pfSense giving me incorrect memory usage when VirtIO memory ballooning is used?

I am running pfSense as a KVM/libvirt guest. When I configure memory and currentMemory both to 2048 MB the pfSense dashboard shows ~2GB of ram and 18% utilization. If I set memory to 2048 MB and ...
Chris_F's user avatar
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2 answers
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Timeout for access from Guest VM to Host

I use virt-manager to administer my virtual machines. I would like to communicate a virtual machine (Windows) with the host machine (GNU/Linux). I use the default network interface, which is a bridge ...
anderson's user avatar
1 vote
0 answers
1k views

How to make KVM guest stop showing both host and guest mouse cursors as it makes guest very hard to use?

I've created a CentOS 7 (KDE) VM on a Centos 7 KVM server without X or GUI, and there's only one guest on this server. I see two cursors in the virt-manager VM console: the host cursor and the guest ...
Fenyx's user avatar
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1 vote
1 answer
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Windows VM on Linux with dedicated GPU and memory

I'm building a new PC. I want windows for gaming and some C++ work targeting the hololens. However, my primary development machine would be linux. I have 32Gb ram, 2 x 1tb m.2 memory, one 3080 and no ...
Edward's user avatar
  • 111
3 votes
2 answers
5k views

Virt manager error: unable to find any master var store for loader

I followed the guide here https://github.com/kholia/OSX-KVM but I got an error after importing the VM into virt-manager. Specifically, I get the error 'unable to find any master var store for loader' ...
Domiic's user avatar
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1 vote
0 answers
347 views

sudden Oracle 8 KVM Container crashes on startup " internal error: End of file from qemu monitor"

we have 2 Hardware-Servers with Ubuntu 20.04 LTS on both we run Oracle linux 8 via KVM. They were working fine until today. Both do not boot correctly with the following error message on the host ...
Ari's user avatar
  • 11
3 votes
1 answer
7k views

Performance issues with KVM versus Virtualbox

I'm trying to use KVM on Ubuntu (5.8.0-59-generic #66~20.04.1-Ubuntu) and finding some serious performance issues. In order to quantify the problem, I tried a fresh install of Windows 7, both under ...
andy28's user avatar
  • 35
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0 answers
359 views

Assigning public IP address to a VM hosted on a server behind NAT

I have a pool of public IP addresses (95.xxx.xxx.196 - 254). I also have a server hosting KVM machines. It has a private IP address 10.0.0.1 which is NATed by the router to the 95.xxx.xxx.200 address ...
Mhalapenio's user avatar
1 vote
0 answers
685 views

Arch single-GPU KVM passthrough goes back to login when booting VM

Alright, so I made my KVM setup according to this video. https://www.youtube.com/watch?v=BUSrdUoedTo I'm running with an AsRock Fatal1ty motherboard, and an RTX 2060. Whenever I boot my VM, it goes to ...
Fury Wings's user avatar
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Drivers not working for a pass through GPU

I recently made a Virtual Machine using virt-manager, and I pass through a GPU. When I turn on the guest (Windows 10). It disables the device and locks the screen resolution to 800x600. I have no clue ...
Gersom's user avatar
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1 vote
1 answer
2k views

KVM Virtual Machine Network - Guest-guest/VM-VM only network (no host/hypervisor access, no outbound connectivity)

I know that with the virsh command I can create several types of networks (a "NAT network", for example) as we can see in these URLs... KVM network management KVM default NAT-based ...
Eduardo Lucio's user avatar
1 vote
1 answer
5k views

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 ...
boskar's user avatar
  • 13
1 vote
0 answers
413 views

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 -...
HTR's user avatar
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2 votes
1 answer
4k views

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 ...
user3728501's user avatar
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5 votes
1 answer
10k views

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 ...
user3728501's user avatar
  • 2,714
0 votes
1 answer
612 views

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 ...
dandreye's user avatar
0 votes
1 answer
5k views

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 ...
Vorilich's user avatar
0 votes
1 answer
1k views

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 [email protected] -L 5903:127.0.0.1:5903 -N -T and then run open vnc://...
sunknudsen's user avatar
0 votes
0 answers
63 views

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 ...
lese's user avatar
  • 105
0 votes
1 answer
456 views

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.
Jonathan's user avatar
1 vote
1 answer
812 views

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 ...
KJ7LNW's user avatar
  • 383
0 votes
0 answers
157 views

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 ...
Salem F's user avatar
  • 336
0 votes
0 answers
4k views

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: ...
Turnix's user avatar
  • 1
0 votes
1 answer
4k 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/...
Aephir's user avatar
  • 89
2 votes
1 answer
5k views

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 ...
Punko Brewster's user avatar
1 vote
0 answers
311 views

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 ...
RandomInsano's user avatar
0 votes
1 answer
2k views

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 ...
Serrano's user avatar
  • 103
0 votes
1 answer
411 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 ( ...
munish's user avatar
  • 1,013
2 votes
3 answers
3k views

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, ...
404 Name Not Found's user avatar
0 votes
0 answers
4k 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 ...
starboy's user avatar
0 votes
1 answer
112 views

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 ...
user1219175's user avatar
3 votes
2 answers
6k views

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 ...
Ft3ca's user avatar
  • 31

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