Questions tagged [linux-kvm]
Linux Kernel Virtual Machine is a virtualization system (VM)
436
questions
0
votes
0
answers
13
views
Virtual machine in KVM - Creating a Bridge is "not supported"
I have a Dell Optiplex system that I am running Zorin OS on, but I have several reasons (for my homelab software, convenience, etc) to want to run a Windows device in my environment. Currently I am ...
- 25
0
votes
1
answer
18
views
Cannot seem to install virtio scsi drivers in a VM of Win server 2022
The Win server 22 VM did get the latest virtio-win ISO installed. Im passing the entire device like so:
<controller type="scsi" index="0" model="lsilogic">
<...
- 101
0
votes
0
answers
20
views
How to use internet and Bluetooth on host OS via guest?
My laptop comes with a Wi-Fi card that is unsupported by the kernel and only has Windows drivers, so I am trying to obtain wireless connectivity through a Windows 11 VM. I have managed to obtain Wi-Fi ...
- 101
0
votes
0
answers
44
views
Couldn't manage to setup a firewall in Debian 12 using nft, but with ufw worked as intended
I'm studying Kubernetes and how to setup a Kubernetes cluster. For this I'm using KVM, on my virtual machines setup I have defined a bridge connection to connect the VM directly into my router, so I ...
1
vote
0
answers
51
views
Error 43 with Nvidia card in passthrough, not the usual suspect
My video card is returning an error 43. It's an Nvidia Geforce 1060. I have never bothered to remove any of the passthrough workarounds I have amassed over the years, so it's not related to the ...
0
votes
0
answers
43
views
VM Filesystem Issues with KVM Ubuntu Server
I have a machine I've built that runs QEMU KVM on Ubuntu 24.04 and it is having file/drive issues inside a bunch of the VMs (Windows 11, Ubuntu, etc) and possibly the host too. I'm guessing it could ...
- 91
0
votes
0
answers
69
views
Retrieve hypervisor host/session id from inside guest VM
I have a VMware VM which is quite sensitive. It needs to be scheduled at max. 500 ms or otherwise it will restart itself. In case there is some heavy process in parallel with the VM (e.g live ...
- 1
0
votes
0
answers
174
views
QEMU-KVM VM freezing the host machine when using Nvidia gpu PCI passthrough
I have intel integrated graphics and nvidia 1650 mobile graphics card. I am loading my xorg server only using the integrated GPU. The NVIDIA GPU loads which nvidia driver on boot. I have libvirt hooks ...
1
vote
1
answer
962
views
VirtualBox can't operate in VMX mode
Recently, I tried to use VirtualBox and got this error,
VirtualBox can't operate in VMX root mode.
Please disable the KVM kernel extension, recompile your kernel and reboot.
(VERR_VMX_IN_VMX_ROOT_MODE)...
- 13
0
votes
0
answers
45
views
How to perform windows 10 installation on a nested VM?
I am currently developing a proof of concept for academic purposes that involves a fully unattended installation of Windows 10 within a nested L2 VM. The architecture is as follows:
L0: Linux ...
0
votes
1
answer
188
views
How can I create a VM in virt-manager that can access the internet through the host but can't even see the host or other devices on the LAN?
I want to create a VM for testing purposes -- questionable websites, files that could be infected with a virus, etc.
So I want to create a VM and that VM should be able to access the internet but it ...
- 418
0
votes
0
answers
265
views
Arm cpu nested virtualization, How can I make VCPU start from EL2？
Recently I've been testing Arm architecture nested virtualization. Since I don't have actual Armv8.4 CPUs, I used QEMU-9.0.0-rc2 to simulate an Arm chip. According to the QEMU changelog, support for ...
- 1
0
votes
0
answers
62
views
Get Gnome Boxes to recognize guest created in Virt-manager
I have a Windows 10 guest that I created in Virt-manager, it has a qcow2 virtual disk that is stored in a non-default location. It is actually on a different partition altogether.
How can I get Gnome ...
- 256
1
vote
0
answers
141
views
How to upscale video resolution on QMEU virtual machines?
I am trying to run some KVM QEMU virtual machines. However, I am running on a machine with fairly limited resources and a 4K screen. Therefore, I would like to run the virtual machines at lower ...
- 141
0
votes
0
answers
125
views
How to enable KVM paramters such as enable_apicv?
In numerous guides (such as this one), I've seen that running $ cat /sys/module/kvm_intel/parameters/enable_apicv should return Y, but for me it returns N.
But this guide doesn't tell how to fix it. ...
- 101
0
votes
0
answers
200
views
Create a Group RW-access for a KVM shared folder via virtiofs on Ubuntu Server 22
I have a folder /common on an Ubuntu Server 22 host which is RW accessible by all users in group users i.e. user alice (with uid 1000) is a member of users (with gid 12345) and has fuull RW access to /...
- 131
0
votes
0
answers
1k
views
Prevent mouse from being hidden in Ubuntu when running as KVM/QEMU guest
I am testing software on a VM. The software I am testing controls the mouse, and to test it I require the mouse cursor to always be visible (i.e. when the mouse is not captured by the VM software).
I ...
- 3,450
1
vote
0
answers
316
views
Remove device that was added to qemu/kvm without a short id
I have a KVM virtual machine that I would rather not restart. A USB device was added to it using the qemu monitor device_add command without specifying an id. I want to unplug the device so it can be ...
- 451
0
votes
0
answers
51
views
VirtManager, guest pause/save->resume, cannot RDP into guest
If relevant, the guest is using "Macvtap device" as the "Network source". It seems that if I apply "pause" or "save" on the Windows guest, and then resume it, I ...
- 4,054
1
vote
0
answers
201
views
KVM/QEMU Virtualizing Existing Linux From Another Partition
I have two arch installations: one is on /dev/nvme0n1p2 (this holds both the root and home directories) with its EFI on /dev/nvme0n1p1 (different partition on same physical disk).
Another arch ...
- 111
0
votes
1
answer
670
views
Nested QEMU-KVM hanging with `watchdog: BUG: soft lockup - CPU#3 stuck for 134s!` kernel messages
I have an issue with QEMU-KVM on Ubuntu Server 22.04 running another QEMU-KVM virtual machine.
First VM is launched via libvirt-based Virtual Machine Manager in privileged mode via following command ...
- 1
1
vote
0
answers
108
views
KVM host and guest cannot communicate, other traffic works fine
I have a KVM host and a guest on it.
The KVM host hosts a mail service (postfix). The VM is a spam filter (called "spamfilter" for ease).
The basic problem and question is that spamfilter (...
- 64
0
votes
0
answers
39
views
same ip range and subnet in 2 different bridges
I am trying to create 2 different virtual networks in the same ip range (not using NAT) in virt manager.Doesn't work with the gui or editing the xml of the new virtual network . Is the best way to ...
- 1
0
votes
2
answers
316
views
Shutdown VM when graphical console is closed
I have a Debian 12 VM with QEMU/KVM as hypervisor and Virt-Manager as a frontend and SPICE for graphical output.
The purpose of this VM is to be used interactively and so I'd like not to leave it ...
- 65
1
vote
0
answers
170
views
AMD GPU pass-through doesn't work on Windows 7 (even though NVIDIA works)
I have a multi-gpu VM setup (Nvidia GTX 970 and AMD RX 6600) with Windows 7, Windows 10, macOS virtual machines. I pass GPU directly to a guest operating system (isolate from host-os and pass them ...
- 180
1
vote
1
answer
680
views
kvm qemu guest_agent issue on windows vm's
i'm using kvm virtualazor
i have windows vm and i successfully installed the drivers and qemu-ga i do active the guest agent option in virtualazor but unfortunately its wont recognize the agent
inside ...
- 13
0
votes
1
answer
638
views
connecting Ubuntu host and Windows 7 guest with samba
I have a Windows 7 guest OS on a Ubuntu 22.04 host and I'm trying to set up a Samba connection to transfer files between them. This is how I understand it should work:
On the Ubuntu host:
1: install ...
- 325
0
votes
1
answer
4k
views
How to Reach QEMU VM's with IP Address (Optionally Static)?
Situation
I have two QEMU KVMs (named master and worker, respectively) running on my laptop. The VMs use the headless server edition of Ubuntu 22.04, and the laptop is running Mint.
Goal
I want three ...
- 101
0
votes
1
answer
299
views
KVM VMs with public ip addresses and VLANs
I was tasked at work (ISP) to set up a KVM host with 2 VMs running on it; all three should have public IP addresses (host + 2 VMs). I managed to set them all up after doing a bit of digging and ...
4
votes
0
answers
906
views
AppArmor issues with Libvirt
I have a fresh Ubuntu Server 22.04.3 and Debian 12.1.0 installed and updated. Along with Cockpit and Cockpit virtual machines on both tests machines.
I am getting the following errors and warning when ...
- 41
0
votes
0
answers
931
views
Dramatic difference in network performance between multiple KVM virtual machines, accessing a bridged physical interface
I have noticed a very peculiar difference in network speeds for the 3 VMs I have created. For one VM the network works without any issues. For the next the packet loss is between 50 and 100%, usually ...
- 745
1
vote
0
answers
186
views
Unable to split USB devices to Different USB Busses. Is this a hardware issue or Linux issue
I have i9-13900k CPU running on Asus Z790 MB.
When using lsusb. I found out that every USB device is assigned to BUS 1. It does not matter which USB port I use on the computer. I would like to Split ...
- 141
0
votes
1
answer
360
views
Druid coordinator cannot talk to the rest of the cluster
I'm deploying a 5-KVM cluster with Hadoop, Spark and Apache Druid for testing purposes, and I'm stuck on an issue about Druid. The running cluster is organized as this:
hadoop-master: also hosts ...
1
vote
2
answers
1k
views
How to run Qubes OS on KVM?
Is there a way to get Qubes OS working in KVM, it freezes short after into boot.
I tried to boot into new kernel but result is still the same.
0
votes
1
answer
1k
views
Trying to script the install of qemue agent on cloud-int VM
I am currently using Proxmox to deploy some VMS. I am using a script supplied by here.
My current script is as such
#!/bin/bash
#Create template
#args:
# vm_id
# vm_name
# file name in the current ...
- 803
0
votes
0
answers
364
views
How to connect to local KVM guest via remote SSH tunnel to ssh
I try to set up a connection as follows:
ssh -f -N -L 5916:localhost:22 [email protected]
[email protected]'s password:
It asks for a password , but the connection doesn't work.
nmap ...
- 1
0
votes
1
answer
1k
views
Why won't windows boot in virt-manager KVM VM?
I'm following this tutorial on how to run windows apps seamlessly in using winapps and my VM won't boot. It gives the message "Boot failed: Could not read from CDROM (code 0004)". I made ...
0
votes
0
answers
2k
views
KVM | QEMU (including virt-manager) issue with Linux host single GPU passthrough for macOS guest has blank screen
Okay folks! What needs to known in advance is that my initial VM solution has a working installation with a macOS Ventura guest on a Kali/Debian Linux host prior to extending the baseline ...
4
votes
1
answer
3k
views
Can I get more screen resolution options for a QEMU virtualized Windows using a VirtIO graphics card?
When virtualizing e.g. a Windows 10 installation with QEMU and using the default graphics card (with no command line option set), it shows up as a "Microsoft Basic Display Adapter", and one ...
- 165
1
vote
0
answers
183
views
Graphic glitches in virt-manager win-xp guest
I'm having graphical issues with my windows XP guest in virt-manager. I haven't done any extensive testing, but at the moment I have only encountered it inside the game 3D Pinball Space Cadet (which ...
- 131
3
votes
1
answer
2k
views
Why was the forced-shutdown function in virsh named "destroy"?
Year after year, I keep wondering (to put it lightly), who did name the restart function of virsh "destroy", and why.
It seems to me to be a complete 💩-head thing to do; but it must have ...
- 179
0
votes
0
answers
424
views
Wininet.dll repeatedly causes explorer.exe and dllhost.exe to crash
I am using SUSE's Harvester to run virtual machines (It uses KVM). Using that, I created a virtual machine with a Windows 10 Pro installation (22H2).
Today when I restored the vm from a VM snapshot, ...
- 433
0
votes
2
answers
2k
views
Virtualised Windows 11 under virt-manager (QEMU/KVM) can't find USB SSD storage drive
My virtualised Windows 11 under virt-manager (QEMU / KVM ) can see the USB wireless mouse, but cannot see the USB SSD storage device.
I took a check from the inside of Windows 11, in Disk Management ...
- 1
2
votes
0
answers
572
views
KVM/QEMU Extra mouse features
I have Windows 11 VM running on a Debian host. I am using virt-manager to configure and use the VM.
Does anyone know how to get the mouse back/forward buttons and horizontal scroll to work when ...
- 68
0
votes
0
answers
348
views
KVM/QEMU Linux host Windows client video driver problems
I am using Ubuntu 20.04.4 LTS with KVM/QEMU. I have a Windows 10 client running smoothly performances wise with virt viewer. All that works fine but the problem is the graphics driver. I have a nVidia ...
- 101
0
votes
1
answer
1k
views
Windows VM works from QEMU CLI but produces BSOD from virt-manager
Overview
I have a Windows 7 virtual image that I can successfully spin up using the following qemu command in the terminal:
qemu-system-x86_64 -m 4096 -boot d -enable-kvm -smp 2 -net nic -net user -...
- 37
1
vote
1
answer
2k
views
Why does enabling Memory Integrity (HVCI) reduce performance of my Windows 10 QEMU/KVM virtural machine significantly?
I have a Windows 10 guest inside of a QEMU/KVM virtual machine that I use for running Windows-only software. Today, I tried enabling "Memory Integrity" inside of it via the Windows Security ...
- 146
0
votes
0
answers
310
views
How to create an overlay subnet for KVM guests on multiple hosts on OpenNebula?
How do I setup an overlay network spanning 2 physical hosts?
Here is my network infrastracture in question.
I'd like to be able to provision multiple VM's via OpenNebula and setup a different subnet ...
- 1
0
votes
1
answer
411
views
qemu-kvm on centos: how to get back vmvga?
I am currently using qemu-kvm (reports version QEMU emulator version 4.2.0 (qemu-kvm-4.2.0-59.module_el8.5.0+1063+c9b9feff.1)) as virtualization engine.
My guest is an old SLES instance with 2.4smp ...
- 1
0
votes
0
answers
3k
views
How to SSH into virt-manager guest from host?
I have a Debian host OS. I installed virt-manager and created a guest Ubuntu 22.04 OS on a virtual machine.
I retrieved the IP address of the guest OS by running ip addr on the (Ubuntu) guest OS's ...
- 215