Questions tagged [qemu]

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

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qemu-system-sparc: shared memory between host and guest

All, I've been looking into passing things between a host's shared memory and guest OS's shared memory, and have come across this link. I've been able to successfully reproduce the output shown at the ...
fireshadow52's user avatar
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582 views

QEMU Win10 resolution change doesn't work when window resized

I have VM with Windows 10 as guest and would like to set up automatic resolution change when window (qemu integrated display or virt-viewer) is resized, but it doesn't work for me. My virtual machine: ...
ArrayON_56's user avatar
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QEMU acting very weirdly

this is my first question on this website. For a long time now I've wanted to make a virtual machine for gaming. Maybe not with a full single GPU pass through but I've wanted it to support OpenGL. It ...
Szyszqu's user avatar
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337 views

IP address removed from docker0 bridge on QEMU/KVM virtual machine

I'm renting a virtualized server running Ubuntu 22.04 and I'm trying to run Docker containers within it. The server is virtualized with qemu-kvm. Unfortunatly, the containers don't have network access....
Eric's user avatar
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print branch taken or not in qemu plugin

How to print branch taken/not taken if branch instruction in the qemu execlog plugin? api.c does have a get_ms option but on using it it shows the error: undefined symbol: get_ms
Kirti's user avatar
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Qemu: How can I get a Bash?

I have a file system directory file/ and a kernel file zImage. At first, I converted the file system directory to SquashFS format. I used the following command for this: mksquashfs file file.squashfs ...
majidmc2's user avatar
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trace-pid file not being generated. Why?

I'm trying to generate the trace-pid file, but it isn't being generated. However instead of trace-pid file being generated, the entire output of that file is being printed on the terminal itself. Why ...
Aananya Nagpal's user avatar
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2 answers
2k views

USB passthrough to VM with maximum isolation from host

I'm thinking of experimenting with some USB devices in a virtual machine (preferably QEMU). For security reasons, I don't want to let them interact with the host. Things I've tried: Doing nothing ...
shy_potato's user avatar
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Tracing is disabled in my QEMU. How to solve that?

This was my configure command: ./configure --target-list=x86_64-softmmu --enable-kvm --enable-trace-backends=simple --disable-werror The build is also successful. But when I'm doing: sudo trace-cmd ...
Aananya Nagpal's user avatar
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1 answer
249 views

How to fix configure error in QEMU?

I'm facing an issue with configuring QEMU for generating traces. This is how my config.log looks like: # Configured with: '/home/aananya/qemu-8.0.0/configure' '--target-list=x86_64-softmmu' '--meson=/...
Aananya Nagpal's user avatar
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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 ...
nadermx's user avatar
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aarch64 VM; amd64 host; "invalid accelerator kvm"

I have an ARM64 machine, which I want to emulate as a VM on my desk for testing. This will be the first time I'm emulating ARM64 on an AMD64, I'm clueless, and I went fumbling for hints. I found one ...
Michael Jinks's user avatar
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232 views

QEMU not saving CPU Pinning for a virtual machine

I installed a Windows 10 and Windows Server 2019 virtual machine under my Rocky Linux 9.1 KVM hypervisor. My plan for this setup is to practice system administration, and I'd like to be able to run ...
drwyatt's user avatar
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Can I mount an empty qcow2 image?

I am trying to mount my image.qcow2 to nbd device on my linux machine using the following command: guestmount -a test.qcow2 -i --ro /mnt/test_qcow/ but I get the following error: guestmount: no ...
MijatTomić's user avatar
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virtfs works in standalone QEMU, but not in Yocto-qemu

I need to mount a folder (or whatever) to a filesystem in qemu. mounting FAT worked in Poky, but not on our custom image. So... I tried virtfs, because it looks promising. Again I used Poky as a ...
Opifex's user avatar
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429 views

(QEMU) -audio coreaudio,model=sb16 doesn't create sound card for guest

I'm trying to create an Alpine virtual machine on MacOS (macos host) and I want to be able to play sound from my QEMU VM. I have tried the config listed in the title as well as "-audiodev driver=...
Mindustry Logic Processor's user avatar
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1k views

How to tunnel all traffic of a QEMU VM through a Proxy?

I'm trying to make a VM in which all its traffic goes through a proxy (like a tor proxy or any other ip/port proxy). I've found this article showing that it is possible in command line, however I'm ...
Fnr's user avatar
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virt manager does not let me remove Display spice

I try removing spice in Qemu virt-manager and I keep getting Error Removing Device: unsupported configuration: Spice audio is not supported without spice graphics Traceback (most recent call last): ...
jon_will's user avatar
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QEMU unclear id option

What is id option. I have no idea what it is and there are no results about it. For example from Arch Linux wiki qemu-system-x86_64 -nic user,id=nic0,smb=shared_dir_path disk_image What is id=nic0 ...
Balora's user avatar
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All Windows 11 nics bridged to windows qemu

how can i bridge all network interfaces from my windows-11 install to the guest system???? I use the windows qemu client. For now use this command with 1 nic in guest, but that do not help me. qemu-...
Markus's user avatar
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627 views

How to execute a riscv64 binary on qemu-system-riscv64?

I want to run a simple hello world program compiled for riscv64 machine on qemu. I have qemu-system-riscv64 and the riscv64-linux-gnu-gcc toolchain installed. Is there sequence of command line steps ...
A. K.'s user avatar
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How to set different dynamic IP address for each QEMU VM?

(Warning, предупреждение, попередження, avertissement (and whatever your language is): English is not my primary language. I wrote this through a translator). I need to run about 7 virtual machines ...
wineT's user avatar
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Cannot create QEMU virtual disk through command line

My problem when making a QEMU virtual disk is that it doesn't let me create it. I discovered this when I wanted to install Windows 98 build 1702 on QEMU and load QEMU through the command line. I ...
userplay90233's user avatar
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348 views

Port forwarding between Host and QEMU VM

I am accessing a host using a SSH over a VPN. That host have a VM on QEMU which I deploy using virt-manager. The host and VM are able to communicate. The VM have a Apache Webserver running. I am able ...
Nifty's user avatar
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1 answer
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/sys/firmware/efi/efivars mount point does not exist on artix (QEMU on arch) EFI variables are not supported on this system

I'm trying to install Artix Linux on a virtual machine before I install it on actual hardware. I'm using QEMU. When trying to install GRUB via grub-install --target=x86_64-efi --efi-directory=/boot/...
redpz's user avatar
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"Error Loading operating system" on QEMU

The Windows 2000 Professional virtual machine is essentially installed on VMWare Workstation Pro, when I convert the VMDK file to QCOW2 or run the VMDK file directly using Virt-Manager, it shows "...
TechVio's user avatar
1 vote
2 answers
1k views

QEMU (with virtmanager) boots to uefi shell when trying to install windows 11

I'm trying to make a windows 11 qemu VM on my arch linux install but when I start it it shows: this what can I do to make it boot normally into the windows installer with UEFI and secure boot?
Maxb0tbeep's user avatar
2 votes
1 answer
1k views

QEMU: Executing guest program in foreground

I use QEMU to run a Windows 10 virtual machine (VM) on an Ubuntu host. My goal is to programmatically instruct the VM to run a specific GUI program in the foreground, as if the user had started the ...
Matt Bushmills's user avatar
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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 ...
Stacey Pellegrino's user avatar
1 vote
0 answers
197 views

QEMU in Linux container connected to over SSH

I have been trying to use QEMU to get a VM (CentOS) running hosted in a container that I use a Putty SSH session to connect to. It seems I have issues with the serial input. I am using this command ...
Steve4879's user avatar
1 vote
1 answer
522 views

QEMU User Mode Networking bypass the VPN on Windows

On Windows, I am using a simple VPN to access content blocked in my country. When this VPN is running, it seems that all the Internet traffic is going through it: web browser, mail client, CURL, ...
Robert's user avatar
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1 answer
282 views

QEMU startup zoom automation

Each time I start QEMU I do the same series of clicks: View->Zoom to fit, and then grab the corner of the QEMU window and drag to zoom about 2.5 times. Can this be automated so qemu just starts ...
exebook's user avatar
  • 362
2 votes
0 answers
641 views

Allow a QEMU VM access to the internet, while blocking access to LAN

Host OS: Arch linux I have read the qemu and libvirt documentation regarding networking but still cannot get this to work. I am trying to set up a Linux virtual machine for general use that has access ...
nullbroker's user avatar
4 votes
1 answer
2k 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 ...
Tobias Leupold's user avatar
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0 answers
256 views

QEMU guest internet access

I have read many documentation and threads but could not figure out how to allow the guest machine to access the internet. Below is the command for creating the guest Alpine Linux machine on MacOS ...
Mr.'s user avatar
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1 vote
1 answer
362 views

Setting up the EFI Shell in Qemu to allow for Http requests

I am developing an UEFI App that will need to perform a GET request through http. As a start up point, I want to make sure my setup is working properly so that the http requests can actually go ...
CrossedCarpet's user avatar
0 votes
1 answer
2k views

How to work with QEMU snapshots/savevm in a way that is predictable like virtual box?

Q: is there a way to have a running QEMU vm, where i have the option to (online or offline) save a restore-point as I go? long text with investigation, alternatives already examined and small rants: I'...
gcb's user avatar
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QEMU: slow network performance with virtio_net driver

I'm running KVM/QEMU 7.2.0 with Linux for both host and guest (kernel 6.1.6 on x86_64). For the virtual networking, I'm using bridge device on host to which guest attaches its NIC as tap device: -...
jurez's user avatar
  • 615
2 votes
1 answer
740 views

How to connect standalone QEMU sessions to libvirt user-session?

I would like to have qemu started machines running in user space, but during development I would like to issue commands to it using virtsh. (note, this is not because I need virtsh, but the QEMU ...
gcb's user avatar
  • 4,863
1 vote
0 answers
157 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 ...
Arthur's user avatar
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1 answer
801 views

How to get failure cause of qemu-img?

qemu-img just quits with error code 1, and no mention of what was the actual problem. i'm running the very first command from their docs: https://wiki.qemu.org/Documentation/CreateSnapshot#...
gcb's user avatar
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1 vote
1 answer
867 views

Why QEMU gives "Permission denied" when trying to commit to a snapshot?

I'm running QEMU in full emulation mode with a QCOW2 image with -snapshot I can make changes to the machine, and when i terminate the instance, the QCOW2 image is still on the original state. But if I ...
gcb's user avatar
  • 4,863
1 vote
1 answer
2k views

QEMU + KVM (Keyboard, Video and Mouse) what are my options?

I'm using QEMU with KVM (kernel based virtualization) and I want to connect my virtual machines to my physical KVM (keyboard, video and mouse) switch. GPU passthrough would be an option but I don't ...
Marco's user avatar
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0 answers
217 views

Use DHCP server from local network for guest system

I have a host system connected to with eth0 interface to the local network. Host system get network config from DHCP server that runs in this local network. I want to test PXE related configuration of ...
Kamil Zaripov's user avatar
3 votes
1 answer
3k views

How to let qemu acquire memory dynamically?

My command to start qemu looks like this: $ qemu-system-x86_64 \ -name guest=win10 \ -m 4830196K \ -enable-kvm \ -drive file=win10.img,format=raw,index=0,media=disk,if=virtio \ .......
aszswaz's user avatar
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1 vote
1 answer
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Confusion about NTFS compression and `du` on ZFS (was: How to *really* disable NTFS compression?)

I am using ZFS with compression+dedup on my host system and use Qemu/KVM for virtualization. I wanted to let ZFS do it's job and disable Windows 10's NTFS compression feature (both, CompactOS and NTFS ...
c0d3z3r0's user avatar
0 votes
2 answers
1k 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 ...
Ernest's user avatar
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0 votes
1 answer
382 views

How to check QEMU virtual machine filesystem without the user password

I'm doing a couple of tests of Ubuntu autoinstall using cloud-init. In order to do so, I am following an example that's presented in the Autoinstall QuickStart page. In the given example, the ...
bert's user avatar
  • 177
1 vote
1 answer
1k views

Boot physical win10 disk in QEMU

https://www.tenforums.com/virtualization/179771-using-physical-disk-kvm-qemu-windows-vm.html?__cf_chl_tk=z_c4bUjts37uHd66EhURNiy75Wla6ioAk1ettZofip4-1670079604-0-gaNycGzNCH0 this got me the farthest ...
ипос втарой's user avatar
2 votes
0 answers
394 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 ...
Craig H's user avatar
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