Questions tagged [qemu]

QEMU (short for "Quick EMUlator") is an open source machine emulator and virtualizer.

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systemd twice mounts entry in fstab during boot, first attempt fails with bad option, second one works fine

Running Debian 5.10 within QEMU, I'm using the 9pfs file system to access files stored on my host system, as Debian comes with built-in support and QEMU supports that file system natively. When booted,...
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Port forwarding not working in qemu/kvm guest

I'm trying to enable port forwarding in my QEMU/KVM guest with no luck at all. I'm invoking the KVM instance by the following command sudo qemu-system-x86_64 ./vm1.img -m 2G --enable-kvm -pidfile vm1....
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macOS host Problems with QEMU audio on Debian installation

I want to virtualize debian 11.2 with QEMU. However, the guest operating system has no audio. Since I'm blind and therefore work with a screen reader, it's important that the sound works. My host is a ...
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QEMU/KVM, using full physical disk is faster than raw .img file?

When adding an HDD to a guest in QEMU/KVM in Virt-Manager, there are "qcow2" and "raw". "raw" seems to be storing the data in a file with the ".img" extension. ...
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How define custom DNS server for QEMU VM via CLI?

How define custom DNS server for QEMU VM via CLI? I want only for that virtual machine dns at 192.168.1.51 which is pi-hole. sudo qemu-system-x86_64 -gtk -m 1G -hda "ubuntu22.qcow2" -cpu ...
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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 ...
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Libvirt conf - cdrom boot issues

I am having issues with the booting debian or ubuntu netinstall images when using libvirtd, I get the menu, but simply get this when selecting the menu optiont o install: loading /install.amd/vmlinuz ...
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How to enable Hyper-V in a windows guest?

I have a Windows guest OS installed under QEMU kvm (host is Linux), the system works fine, but Both task manager and systeminfo showed that Hyper-V is supported but disabled in firmware, how can I ...
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How to boot dd generated Win95 Image?

I want to boot an old Win95 Image, that I generated with dd by a real drive. qemu-system-x86_64 -cpu pentium3 -m 512 -rtc clock=host,base=localtime -drive file=win95.iso,format=raw results in qemu ...
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Why can’t I seem to run a VM via virt-install from the command line in macOS?

I try to run VM with emulation on MacBook 14 M1 Pro on macOS Monterey (12.3.1). I installed libvirt 8.2.0 and virt-manager 4.0.0 via brew. I used this formula for virt-manager: class VirtManager < ...
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Can I run a Juniper vMX image on GNS3V (Virtualbox)?

I've been trying to run a Juniper vMX vCP image on the GNS3VM (VirtualBox) with no success whatsover. The template is configured and runs with no apparent problem but when I try to open a session ...
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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 ...
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QEMU on M1 Mac shared mount permissions are incorrect

I've recently started deving on a M1 mac, and I wanted to get a simple linux system virtualized. Multipass seemed like a great idea, until I was struggling to forward ports. So I created a very simple ...
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QEMU savevm crashes QEMU

I created an Ubuntu VM with QEMU on host OS macOS Monterey. Trying to do savvy crashes qemu with the following error code. ------------------------------------- Translated Report (Full Report Below) --...
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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 ...
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QEMU: How to obtain host address from Ubuntu guest?

When using UTM on a Mac with a Ubuntu guest in it, I need to obtain the host IP address (of my Mac) from the guest to mount its file system by sshfs (or any other mount). It runs UTM based on QEMU. I ...
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QEMU: Windows 10 Host to win98 guest, configuring network

I began to post my question on stackoverflow, and my post has been closed with a message to post it here. I hope it's the right place for that. I think il will program a frontend for it for windows ...
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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 ...
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Hard drive for alpine linux on QEMU

I want to run Alpine Linux on QEMU with a host OS of Windows so I downloaded the latest ISO image (named alpine-standard.iso). Then I set up a hard drive file with qemu-img create -f qcow2 alpine-disk....
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Why qemu can't detect a WHPX (Hyper-V) accelerator?

I've been messing around with qemu on Windows 10. I found HAXM as a slow accelerator (for me has the same performance as TCG) and I want a better experience. I found that qemu supports WHPX, using -M ...
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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): ...
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2 votes
1 answer
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QEMU configuration to host a Linux with SSH and HTTP on Windows

I am doing WEB development on Windows 10 operating system. For that purpose, I am running Debian Linux on QEMU. I want to use SSH to connect to the virtual machine, possibly with putty and in the same ...
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How to "alt-tab" out of full-screen Virt Manager?

I'd like to switch from fullscreen in qemu/kvm Virt Manager back to the most recently used window on the main host's operating system (just like alt-tab), but I haven't yet found a solution that works....
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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 ...
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Using qm (qemu) output in a script

I am trying to determine if a QEMU VM has finished booting from inside a script by using QEMU agent. The problem is that I am unable to assign the output to a variable or even pipe it to a file: [root@...
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QEMU-KVM UEFI Secure Boot doesn't work

I try to test this in QEMU-KVM: https://www.knopper.net/knoppix/knoppix-uefi-en.html My host OS is Debian 11 AMD64. I have ovmf .deb package sucessfully installed. I add OVMF to my virtual machine ...
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Qemu - cannot use mouse and keyboard after loadvm on Monterey guest

I'm trying to run Monterey in Qemu using this script with some modifications to allow snapshots. I have a savevm snapshot that takes me to the login screen, however I cannot move the mouse or use the ...
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How to run linux VM on MacOS with Vagrant and QEMU?

Can anyone advise me how to run a headless linux (x86_64) virtual machine on a MacOS Monterey (Intel) using QEMU with HVF? So far I have installed the libvirt and qemu with homebrew, also vagrant-...
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No internet connection when trying to install Arch linux in qemu

I'm trying to slowly switch from windows to linux. So I thought that it will be good idea to install arch on VM. Since I learned about VM's I was using VirtualBox but now I wanted to try qemu, because ...
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How to connect a virtual GPU in QEMU?

So, a QEMU guest machine has some PCI slots by default, I have no idea how many. But regardless, we can attach virtual devices to those slots. As far as I understand, the PCI devices can be fetched ...
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Errors when running sosumi in kali (Qemu)

I installed sosumi in a kali linux VM (Virtualbox) but when i run sosumi to launch the emulator i get these errors: *** Launch! qemu-system-x86_64: warning: host doesn't support requested feature: ...
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Get difference between two virtual machine qcow2 files

I have 2 qcow2 files based off the same .img file created with qemu-img. The guest OS is CentOS 7 and host is Rocky Linux 8. I'd like to get the changes in the file system between the images and I ...
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How to make a snapshot while qemu is running?

Since a fresh booting of the guest OS is very slow, or it is laborious to arrive at a particular machine state, what I want is something like Windows' hibernation: Qemu saves the current state of the ...
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Why does ssh change virgl OpenGL renderer back to llvmpipe software renderer? Can I keep virgl in ssh session?

I created a Qemu VM, both host and guest being Ubuntu 20.04. Then I start the Qemu VM using command qemu-system-x86_64 ubuntu-desktop.qcow2 -m 2G -smp 2 -device virtio-vga-gl -display gtk,gl=on -nic ...
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Qemu VM runs very slowly and virgl not available if using "-device virtio-vga-gl -display gtk,gl=on"

Host: OS (a variant of Ubuntu 20.10): uname -a Linux ... 5.8.0-7642-generic #47~1614007149~20.10~82fb226-Ubuntu SMP Tue Feb 23 02:59:01 UTC x86_64 x86_64 x86_64 GNU/Linux nVidia RTX 3090 GPU ...
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How to have qemu emulate pressing SHIFT key or c key when booting guest?

I can't boot a ubuntu guest OS in qemu, so I wanna to look at booting messages to know what is happening. To that end, I need to enter Grub to remove "quiet splash", but since I can't boot, ...
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Trying to passthru my RTX 2080 ti to a Windows 7 x64 bit vm using virt-manager on Ubuntu 21.10 : it gives error 12

I would like to virtualize Windows 7 x64 bit passing through my graphic card (rtx 2080 ti) with qemu-kvm on Ubuntu 21.10. It's failing for me,so I'm trying to understand what's wrong. After several ...
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Can qemu report its supported optional features?

When building qemu, configure has a list of optional features to choose, like gtk, vnc, hax acceleration, sdl, opengl, etc. If the qemu was built by me, what options are enabled is clear (if I take ...
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Nested guest VM on ESXI is not able to access internet but can access host

I am running x86 Ubuntu 20 on ESXI 7.0 (lets call this as my host VM). On top of Ubuntu VM, I am launching ARM64 RaspiOS using QEMU (this is my guest VM). So you can say I have nested VMs. From my ...
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Exception when running windows 10 in qemu

So I've downloaded the windows 10 iso file on raspbian, and I've tried running it on qemu, but it gives the following error: how do I fix this?
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Cannot run Pop!_OS in qemu on a Raspberry Pi

I've downloaded the Pop!_OS iso file on a Raspberry Pi to run on qemu, but when I run the file with: qemu-system-i386 -L . -hda pop.cow -net nic,model=pcnet -net user -cpu pentium -soundhw all -vga ...
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1 vote
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SSH passthrough?

I borrow the word "passthrough" from GPU passthrough in virtual machine because the concepts sound similar to me, at least from usage point of view. Here I have a QEMU MV, both host and ...
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PPTP VPN timeout issue on Debian bullseye hosted on QEMU/KVM with NAT adapter

I have a working PPTP VPN connection on my Pop!_OS based host machine but the same fails in a Debian-based guest virtual machine hosted in QEMU/KVM. I use NAT networking between the host and the ...
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How to enable copy and paste for VNCViewer and VNC server of QEMU?

The VNC server is launched by QEMU 6.1.0 on Ubuntu, the QEMU being built without any special parameters: qemu-system-x86_64 -hda ubuntu.qcow -m 1500 VNC server running on ::1:5900 The VNC Viewer is ...
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Virtual Machine Manager not running ubuntu 16.04.4

So I've downloaded Ubuntu 16.04.4 iso file and I've tried to run it on qemu, but it gives the following error: This kernel requires the following features not present on the CPU: pae cmov Unable to ...
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2 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 ...
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How to install Windows 10 in Qemu on macOS Monterey?

I am using macOS Monterey I am trying to install Windows 10 on my system using Qemu. I am using below codes in my Mac terminal qemu-img create -f raw -o size=20G Windows10.img qemu-system-x86_64 -...
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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 ...
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Pop!_OS : setting kernel parameters (boot loader options) permanently is not working

Was experimenting GPU passthrough with QEMU (following the steps given here) on Pop!_OS and in the process I added kernel parameters. Now I want to remove the intel_iommu=on kvm.ignore_msrs=1 vfio-pci....
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virt-manager: Can't make a sparc64 vm

OS: Ubuntu 20.04.3 virt-manager version: 2.2.1 Whenever I go to make a sparc64 vm I get this error message Unable to complete install: 'internal error: process exited while connecting to monitor: 2021-...
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