Questions tagged [qemu]

QEMU (short for "Quick EMUlator") is a free and open-source hosted hypervisor that performs hardware virtualization.

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why has dnsmasq started running and taking up 53 so that my unbound can't start

Arch up to date. Through QEMU manager I had recently created a NAT network mapped to my wireless device. The plan is to use the wireless for the VM and the ethernet for the host. Before that the VM ...
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qemu: i specify 2 ide drives, but a third cdrom magically appear

Simple question: I specify 2 ide drives, one is cdrom, other is hard disk qemu-system-x86_64 -m 2048 -drive file=debian-10.0.0.iso,if=ide,index=1,media=cdrom -drive file=disk.img,if=ide,index=0,media=...
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QEMU boot finding and correctly reading /boot but not finding system partition

I have a QEMU VM built from a VirtualBox vdi file converted to qcow2. I have added this to a new virtual machine through QEMU Virtual Machine Manager and set the boot device to the first partition of ...
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qemu newbie: vm startup stopped at 'booting from hard disk'

I have successfully started an Arch install but now want to import a previous VirtualBox VM into kvm through qemu. The ported system is vdi->qcow2 for the boot disk. I can mount the qcow2 to ...
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How to use existing QEMU image

Qemu is new software for me but I want to use existing VM from disk image. So what was done: Bridge was added ho host OS (Ubuntu 20) I installed qemu-kvm VM was launched with this command virt-...
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I can't run The Binding of Isaac Antibirth (Antibirth, not another DLC, I mean the mod) any help?

This happens under a Windows 10, 7 or 11, any way to fix this? The app just won't launch. I know it works on a bare metal machine.
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How to do MIPS R3000 emulation in Qemu?

I'm new to Qemu. I was wondering how I could emulate a MIPS R3000 processor. I am trying to emulate a BIOS for a PSX (which uses a similar custom R3000 processor). How would I emulate the processor ...
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How can I use cloud-init NoCloud with OPNsense 21?

I'm new to OPNSense (also to FreeBSD in general) and I'm interested to use cloud-init to configure at least LAN (vtnet0) with static ip address, root password and eventually running custom scripts (or ...
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qemu cannot format a network drive when formatting C: in win95

I am having issues where when I try to format the c: drive, its says its a network drive. Start code: qemu-system-i386 \ -netdev user,id=mynet0 \ -device ne2k_isa,netdev=mynet0 \ -drive ...
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qemu-img making the server inaccessible (High iowait)

I have a dedicated server with 2 * 1TB NVMe Disk drives, centos 7 os. With virtualizor installed. When i run qemu-img convert : qemu-img convert -f raw -O raw /var/virtualizor/kvm/windows.img /vgs/...
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allocating contiguous memory in QEMU VM result in failure in alloc_pages_nodemask

I am trying to allocate around 33M of contiguous memory but most of the times it fails in __alloc_pages_nodemask call. This is a QEMU Guest OS, and the kernel version I am using is 5.9.1. This ...
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Can I set my virt-manager/QEMU VM (using virgl) to 144Hz?

I've created a Ubuntu 21.04 VM in virt-manager and I've set the graphics to use virgl instead of QXL because it's meant to be much smoother in the desktop. While it works fine, dragging windows about ...
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Booting from real (UEFI) disk image on QEMU

Summary: I wish to boot QEMU with a disk image I created from a real machine running Ubuntu. After creating the image and trying to run QEMU, the VM hangs on "Booting from Hard Disk". ...
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QEMU/KVM: How to add video devices at runtime

My Environment Kubuntu 20.04, Virtual Machine Manager 2.2.1 with WIN10 guest, virsh version 6.0.0, remote-viewer version 7.0 What's Working Currently I've have 3 monitors and have defined 3 Video ...
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How to make Linux bridge act as a hub instead of a virtual switch?

I'm using virt-manager and qemu to run virtual machines. I had a task I needed to complete that involved sniffing traffic from another VM from a Kali Linux VM. Because the bridge network acts as a ...
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Virt-manager -- USB device visibility on host and in Linux VM, but not in Windows VM

I have an FTDI device connected to my host (machine that runs hypervisor i.e. virt-manager/qemu). Host sees the device just fine: ziga@ziga--hypervisor:~$ lsusb Bus 002 Device 001: ID 1d6b:0003 Linux ...
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QEMU Through Virt-Manager Exits Gnome and Crashes. What to do?

Issue When i am creating a virtual machine through Virt-Manager (Virtual Machine Manager), when it starts I am exited from the gnome session and shown my machines boot logo (I have a Asus machine so ...
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Query number of USB controllers (for VM passthrough)

I want to "pass through" an USB controller to a VM guest but only if I have more than one controller, otherwise the host would be left with no USB. My motherboard is an ASUS B450 but I can't ...
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No OpenGL on amd64 chroot on Arch Linux ARM

I am on Arch Linux ARM, and am running a 64-bit chroot in order to get access to some things that are only x86_64. However, when trying to start yuzu or dolphin-emu, it starts, but the text is not ...
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Qemu permision denied, but using sudo

I tried loading a i386 firmware file and its also distributed as an elf file, but executing sudo qemu-i386 file.elf Error while loading file.elf: Permission denied How do I get more information why ...
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How to verify a 2MB huge page on a VM is mapped to a 2MB huge page in system/host physical memory?

I want to use 2MB huge pages on a VM guest to create contiguous 2MB huge pages in system/host physical memory. I have a test program which mmap's 128MB with the MAP_HUGETLB and MAP_ANONYMOUS flags. I ...
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building an arm64 system using x86_64 environment

LS, For well over 40 years being involved with computers, it is time to expand my horizon into other architectures beside Intel/AMD. Most notably the AARCH64 (ARM64) has my latest interest. That said, ...
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Install oracle on an AIX VM virtualizing with QEMU

I installed a Linux VM in the virtual box, and inside it I installed the QEMU package and virtualized an AIX 7.2 image. The entire installation went correctly. But when I try to install an Oracle ...
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Why doesn't Qemu boot my custom linux kernel?

I was watching this tutorial https://www.youtube.com/watch?v=awik6Iittu4 on building our custom linux os. The problem is that when I do qemu-system-x86_64 -hda image I get this output And then it ...
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Pop!_OS make windows fullscreen (not F11)

On my Pop!_OS machine (Ubuntu derivative) I sometimes use the full-screen mode in browsers to focus more using the F11 key. Now, running macOS as a VM via sosumi, I'm in the need of making that QEMU ...
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how to use ftpget from a virtual machine (initrd from busybox)?

Trying to find a way to debug kernel code using debugger, I remembered I've setup initrd and kernel several months ago. So I tried if I can use ftp from the virtual machine to get the application and ...
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Routing data from host to Qemu in Linux

I am sending some data from Canoe in Windows to Linux host. I am able to receive to Linux host PC. Now I would like to route the data from Linux host to Qemu but I am not able to route it to qemu. I ...
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QEMU-KVM: what does "qemu+ssh" mean?

I see instruction for migration like: virsh migrate web1 qemu+ssh://desthost/system What does the keyword qemu+ssh://desthost/system mean? I suppose it means SSH to desthost for authentication purpose?...
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QEMU - Send serial data from host to guest?

This might be really simple, but perusing documentation and forum posts, I'm not understanding how to do it... Running (for example) a Linux system in QEMU, running on top of a MacOS machine. Would ...
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Kernel LOADADDR for QEMU ‘virt’ generic virtual platform? Not enough space for DTB after kernel/initrd

I am trying to emulate an Arm Cortex A8 processor / Texas Instruments Sitara AM335x processor using QEMU to run the firmware of an embedded device. My first attempt was to cross-compile kernel and ...
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Cannot boot existing Ubuntu as qemu VM

I have my normal OS (Devuan) on sda1, Debian 9 on sda2 and Ubuntu 20.04 on sde1. All OS's boot normal when selected with grub during cold boot. When I boot up Devuan I want to run Debian and/or Ubuntu ...
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Backup of VM using "virsh snapshot-create-as" works once. Fails second time

I'm running Ubuntu 20.04 with QEMU 4.2.1 and am trying to setup backups using these instructions: https://libvirt.org/kbase/live_full_disk_backup.html (older libvirt instructions, as Ubuntu 20 has ...
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How to tell qemu to use a specific MAC adderss on a network bridge?

When I create a VM using virt-install, the VM gets connected to the virbr0 network interface automatically by generating this XML configuration: <interface type="network"> <source ...
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Mac M1 QEMU Webcam Passthrough

I'm trying to get an Arch Linux ARM VM working on my M1 Mac with QEMU (I used a special fork with support for vmnet, GPU and hvf). I got everything up and running, but I couldn't get my camera working ...
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Unable to get graphical output in qemu

I am a newbie and trying to get a Linux desktop get installed using QEMU in my Android10 by Termux application. I have got installed a light-weight Debian based desktop. The problem is that it tells ...
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Why is there a libvirt-qemu user (showing on the login screen) and how to remove it?

I didn't create this user - I think it was added by installing the "Virtual Machine manager" (virt-manager) on Debian10/KDE. grep -E 'libvirt|qemu' /etc/passwd returns libvirt-qemu:x:6xxxx:...
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dd command took alot of disk space when just coping open file from file descriptor

I have more than 30 qemu-kvm process open with different images. Their images where accidentally deleted. I searched and i found out that as the file is still open in a process. It can be still ...
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From USB wifi dongle interface determine vendor: product ID

I am in the process of developing a bash script which automates the addition of a USB wifi dongle to a virtual machine (QEmu/KVM virtualization) and therefore to add a wifi key to a VM. [edit]This VM ...
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49 views

KVM disk-based VM on a luks-encrypted disk

I have an Arch linux running windows 10 disk-based VMs. The disk is on a different volume group and is luks encrypted. I have a logical volume for each VM with ext4 file system. I manually edited the ...
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Ryzen 3000/5000 CPU Lockup on ASRock X470D4U

Ahoy ahoy friends. Currently i am running my system, using an ASRock Rack X470D4U motherboard and Ryzen 2700X CPU. I use Debian 11 with 5.10 Kernel and KVM + Libvirt in order to run my 30 VM Guests. ...
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Clean way of running virt-install with an iso file that's in your home directory that user qemu can't access

I have a script that automatically creates and runs a VM. That script is used by many people. You basically call the script giving it some information like what PCI or USB devices you want to pass ...
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How to passthrough GPU in QEMU-KVM? Failing to start

I have tried countless guides and always ended up with the same result, so it's time I ask those who know what's going on. I have all virtualisation IOMMU etc enabled in my BIOS. I am running the VM ...
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155 views

Running x86_64 binaries on arm64

I have been searching for a simple way to run x86_64 binaries on arm64 GNU/Linux. I've tried qemu-user: qemu-x86-64 -L /usr/x86-64-linux-gnu /opt/x86_64program, but I'm getting /lib/libc.so.6: version ...
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in kubuntu 20.10 qemu+kvm+ovmf uefi does not work

I have repeatedly all downloaded and reinstalled. I have written: /usr/bin/kvm -bios /usr/share/ovmf/OVFM.fd -m 5G -hda /dev/sdb or /usr/bin/kvm -bios /usr/share/ovmf/OVFM.fd -m 5G -drive file=/dev/...
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QEMU webcam passthrough from macOS host to Xubuntu guest?

I am trying to pass my (MBP 2019) camera as a usb device to my VM (Xubuntu). I've tried the following, to no avail. sudo qemu-system-x86_64 -accel hvf -boot menu=on -drive file=X.img -m 6G -cpu host -...
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66 views

Capturing Integrated Graphics Card for QEMU Virtual Machine Passthrough

I am currently trying to create a VM setup on an Ubuntu 20.04. Particularly, I was working on passing through the integrated GPU down to the guest. When running lspci -nnk, I get the following 00:00.0 ...
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46 views

How to apply qemu:env command line to virt-manager? (libvirt)

I need to apply this fix <qemu:env name="MESA_LOADER_DRIVER_OVERRIDE" value="i965"/> to my virt-manager VM. However, I don't know where to put it. I tried editing the XML ...
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KVM Ubuntu-20.04 Host, win-10 guest issues (CPU/GPU)

System specs: AMD ryzen 5 4000 series with AMD Radeon graphics, its a laptop so probably integrated graphics. Hi so whenever i try and boot my windows 10 VM i get errors such as failed to load a ...
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libvirt user access stopped working

I'm using virsh and virt-manager to manage some qemu/kvm VMs on an otherwise vanilla CentOS machine. Our admins' user accounts are given the libvirt group. This had worked for a long time, but ...
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How to merge common parts of qemu qcow2 disks

I have a qemu image B.qcow2 that is a snapshot of A.qcow2. I created a copy of B.qcow2 by using cp B.qcow2 C.qcow2 and then worked on both B.qcow2 and C.qcow2 independently. Thus, B.qcow2 and C.qcow2 ...

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