Questions tagged [qemu]
QEMU (short for "Quick EMUlator") is a free and open-source hosted hypervisor that performs hardware virtualization.
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Qemu - attempting to emulate Windows 10 with multiple cores
So I'm trying to get Qemu to use more cores on my Raspberry Pi 4b due to the poor performance on emulating Windows 10, but it seems to be using one of the cores, but not any others. I did use the -smp ...
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SSH issue while building RHEL image using image-builder for EKS Anywhere
I have been trying to build RHEL iso image using EKS-A image-builder, but getting below SSH connection time out error all the time, while connecting to vm after boot.
qemu: output will be in this ...
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Double-tap on touchpad doesn't work in QEMU Debian
help please!
I have Debian on host machine with qemu installed and debian as guest OS. lxde is used both on the host and guest.
Touchpad shows strange behavior, after booting up the VM double tap on ...
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QEMU VM into Boxes
I am a long time linux user (ubuntu-budgie 24.04) trying out VMs recently. I followed this recipe to create a QEMU vm running GhostBSD 24.04.2. It works great from the command line using qemu-system-...
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Kernel panic - not syncing: Unable to initialise architected timer : unable to boot Android 14 with qemu-system-aarch64 on Ubuntu 24.04 X64 bit
I want to emulate Android 14 by KonstaKang using qemu-system-aarch64 and as model virt on Ubuntu 24.04 x64 bit installed on my PC (Intel I9 + RTX 2080 ti).
I've chosen the parameters to boot it,...
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How to create a qemu vm with two disk
I need to create a vm with qemu with two disk, so the second disk appears as second device with name i.e. /dev/sdb
To create with a vm with single disk:
qemu-img create -f qcow2 alpine.qcow2 16G
qemu-...
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Can I start a qemu/kvm virtual machine on a different tty without switching to that tty?
This is an issue that has followed me throughout multiple versions of RHEL, from 7.X, and now onwards to 9.X, with multiple versions of QEMU built against it, all while experiencing the same issue. I ...
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Linux cannot "find" DTB provided by QEMU
I'm trying to use QEMU 9 to emulate a Versatile AB development board and boot Linux.
I've grabbed vmlinuz and initrd.gz from the Debian Jessie netboot installer and the devicetree from contemporary ...
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Waking Qemu From Suspend With USB Device
I am doing research with Linux Power Management interactions with USB devices. Which is why I would like to be able to wake a qemu vm from suspend with a passed through USB device. I have been able to ...
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Host: Manjaro, Guest: Artix Linux, Issue: No virtio internet/NAT connection on VM
Like the title says, for whatever reason my VM no longer connects to the host/internet.
An e1000e connection does work.
So the problem seems to be with virtio?
On host:
ip a
...
4: virbr0: <...
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How is my x86_64 machine is running an arm64 binary? [duplicate]
My machine's architecture is x86_64 and I've cross-compiled arm64 assembly (from here) into an executable. However the binary is still runnable on my machine... how?
Here are the outputs to the ...
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QEMU/KVM connection drops immediately after starting up virtual machine with GPU passthrough
I have a Windows 10 virtual machine with GPU passthrough in Virt-Manager. Recently it has suddenly started to crash the QEMU/KVM connection it is connected to, as in spontaneously disconnecting. Is ...
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Does running a VM typically affect host input lag?
I'm running a Windows 11 VM via qemu/libvirt on my Fedora 40 (Plasma Wayland) host. The VM is configured to use a passthrough GPU, 25% of my cores (6), and 25% of my memory (16GB). For input it has a ...
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Which Linux kernel config options are required to get QEMU virtio to work?
I am currently trying to boot a QEMU VM with a virtio-blk hard disk and I am failing. I cannot seem to get the kernel to recognize the virtio device.
I am on a linux-6.1.97 source tree and ...
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can't boot linux distro I made
I need some help, because when I boot my initramfs.img and my bzImage in qemu it boots normally. but then it just goes:
[ 34.354852] dracut: FATAL: iscsiroot requested but kernel/initrd does not ...
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Simulate slow disks in KVM to see effect of LVM cache in test setup
I'm setting up a Linux system in KVM (QEMU) to test the effect of adding a writeback LVM cache on a fast disk in front of a logical volume that resides on a set of very slow disks (a RAID1 LV). This ...
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I am following a video on setting up Qemu/KVM. Setting up of tuned, I am having a problem with missing parameters. How can I correct these errors?
In setting up Qemu and KVM: I received the following notification.
I have seen several others with this same problem,
but I have not been able to find a post with a resolution to implement.
$ sudo ...
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Not working break in for loop in bash script for mounting a VHD
I'm not an experienced programmer. So maybe it's obvious for you why the break command in this script does not terminate the loop, but I can't see what is causing the problem. I want to use the script ...
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How I can sniff network from host to quest that uses wifi usb device?
I want to achieve this:
I have a Linux guest VM using QEMU, using directly a USB Wi-Fi stick via USB passthrough.
In the meantime, using wireshark, I want to sniff the network data from it. In my ...
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USB device not detected upon quest when I usb passthrough using qemu
I run an Ubuntu Iso as:
#!/bin/bash
MEM_SIZE=4096
qemu-system-x86_64 \
-accel kvm \
-cpu host \
-m ${MEM_SIZE} \
-M q35 \
-bios /usr/share/ovmf/OVMF.fd \
-device qemu-xhci \
-usb -device usb-host,...
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PCI Passthrough PCI Slot Reference Change
I'll do my best to explain this as its confusing. I have Qemu/Virtual Machine Manager on my host PC. I created an Ubuntu VM and assigned two PCI slots (which are physical network cards) to it within ...
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How do I solve the booting issue with qemu vexpress-a9 zImage?
I'm studying about the boot loader.
I aim to build the Linux kernel and boot the zImage on qemu-system-arm. First, I installed a cross-compiler for vexpress-a9. Using crosstool-ng, I installed arm-...
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is it possible to boot into luks encrypted raw disk image with qemu/libvirt/virtualbox?
Done dd of my luks encryted drive, now im courious if its possible to create libvirt/quemu guest and attach that luks encrypted raw image and run it as is? Actually I have Fedora 38 on it with several ...
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Why I see different cpu-migrations from top and perf stat?
New to system performance analyze.
I am curious on how CPU affinity affect kvm virtual machine.
So I try to bind vm's vcpu to physical cpu to improve vm's performance.
find the pid of the vm(ecs-...
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How do I physically pass a USB device to a QEMU VM
I've been trying to use a Linux QEMU virtual machine for USB driver development. I wanted to use USB passthrough but when I check the USB device in the VM, it shows some kind of generated product id ...
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USB passthrough in Android emulator on MacOS M1 failing to acquire exclusive access
I am trying to get my Android emulator to see the Wi-Fi dongle or my Ethernet dongle connected over USB to the Macbook Pro M1. I tried the following methods:
Command:
./emulator -avd MyTestEmulator -...
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QEMU, Debian VM doesn't boot after shutdown on M1
On M1, I 'm trying to run a Debian 12 VM.
After the installation process, whether configured using a deb_preseed.cfg (within the Automated Install) or through the GUI configuration, it fails to run (...
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How to start a qemu virtual machine and from the host, execute some commands to finally shut it down
I'm deploying virtual machines with qemu. Installed OS is Debian with linux kernel debian 6.8.11-amd64.
The way I deploy a vm is directly with qemu-system command (i.e no vm manager).
In a command ...
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libvirtd not starting after unsuccessful GPU passthrough
I attempted to follow this guide on Ubuntu 22.04:
https://wiki.gentoo.org/wiki/GPU_passthrough_with_libvirt_qemu_kvm
I didn't need to change my BIOS or my Kernel, and I skipped the step involving the ...
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OpenRC not starting services
For testing purposes, I need a quick way to generate a root filesystem to use for booting freshly built Linux kernels. I've been doing this by using Docker to create a filesystem and then transferring ...
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Can I use $USER enviroment variable inside qemu.config?
I am installing my first KVM/QEMU based virt manager.
As per the instructions on Arch Wiki, one needs to change the config file of qemu.config.
sudo vim /etc/libvirt/qemu.conf
I used vim to edit the ...
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How do I properly chroot from a amd64 artix VM into a mounted aarch64 armtix OS image?
I want to chroot into an armtix (aarch64) OS image inside an artix VM.
I copied qemu-aarch64-static into the mounted /usr/bin
and then tried to chroot into the mounted image.
It works, however, most ...
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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 be able to create multiple VMs for testing purposes -- questionable websites, files that could be infected with a virus, etc.
I want to make sure these VMs should be able to access the ...
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How to place a qemu vm in background (it means that it should run between the processes but nothing should be shown on the screen)
I would like to run the qemu vm that you see below runs between the processes,so I don't want to see any monitor,graphic,terminal window,nothing should be shown on the screen.
/usr/local/bin/qemu-...
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Understanding the flash translation layer - SSD emulation
Can anyone suggest me a blog/article on how to get an NVMe simulation environment up and running? I'm basically looking at using NVMe as an emulated device in Qemu and tracing the read, write and stat ...
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Need to use .qcow2 VM file format but only have VirtualBox
I only have VirtualBox.
I have a .qcow2 image I need to use.
VirtualBox supports several file formats, but not .qcow2
What are my options?
I'd much prefer not have to change to a different hypervisor.
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Limiting the file size of .qcow2 files [closed]
Qcow 2 files are an open source file format for virtual machines. In my opinion, unlike .vmdk files, they do not offer the option of specifying a maximum file size. This means that they can constantly ...
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Converting a virtual machine a standalone directory hosted on Ubuntu
A software platform I'm responsible for requires a minimal Ubuntu distribution with software that is partially integrated with the OS and uses TTY terminals. We've typically contained the OS in a ...
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How to let two qemu instances access each other under the same network? The host is Windows 11
The first instance is:
.\qemu-system-x86_64.exe -cpu IvyBridge -smp 4 -m 4096 -nic user,hostfwd=tcp:127.0.0.1:10022-:22 D:\vm1.qcow2 -accel whpx
So the network backend is user mode network of qemu, ...
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QEMU/KVM: capturing keyboard shortcuts by the guest operating system
I have installed QEMU/KVM on my Ubuntu and created a new VM.
When trying to switch apps using Alt+Tab or "Show Applications" using Windows key it is captured and interpreted by the host OS ...
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Is it possible to hardware accelerate spice with an nvidia gpu?
It is possible to use virgl with an nvidia gpu:
<graphics type="egl-headless">
<gl rendernode="/dev/dri/renderD128"/>
</graphics>
<video>
<model type=...
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How do I compare performance of two linux kernel images running on QEMU?
I have built a tracing utility for the Linux Kernel and am testing the same on QEMU. I want to compare the performance of the kernel with and without the tracer. How do I go about doing this?
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QEMU - Bridge networking does not work on Debian Bookworm guest on M1 Pro host
I have a Macbook Pro M1 Pro host running a Ubuntu and Debian guests on UTM. The Debian guest is unable to connect to the internet if I use anything but emulated VLAN as the network setting. This is ...
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Qemu GPU/Display passthrough
I want to passthrough my GPU to the QEMU Guest and it complete control of my monitor (seem as if it was the ONLY OS running)
I have tried on a laptop with only the built-in monitor and the screen just ...
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What can cause network drop when running a VM with virt-manager?
I'm new to virt-manager, qemu and libvirt so I barely know how to use them. I use virt-manager's GUI to make it easier for me to do a transition from VirtualBox (including VBoxManage) to KVM.
By far I ...
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103
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Pass-through of OBS Virtual Camera to QEMU
I'd like to use my OBS virtual camera in a virtual machine.
OBS will not run within a virtual machine unless I perform a GPU-passthrough, which I feel is unnecessary and undesirable in this situation.
...
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Display bmp image using u-boot on virtual QEMU
I have an issue of displaying a bmp image using u-boot on virtual QEMU. I've built QEMU using buildroot and added the following options in u-boot.fragement file to support splash screen and virtio gpu:...
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How To Set Screen Resolution Of TinyCore On GNS3 Really High?
In GNS3, I added a Firefox to the topology. It was installed on a TineyCore VM on Qemu. When I open the VM, the Max screen resolution that is available is 1024x768 which is very small for my 4K ...
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How to Enable Restrict User Networking in virt-manager QEMU/KVM User Session?
I want to isolate my network between host and guest in QEMU User Session (qemu:///session). block the unnecessary guest to host and guest to guest networking.
I found an article on QEMU wiki talks ...
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Trying to virtualize my Windows 10 install on linux in a dual boot setup
Currently I am dual booting Windows 10 and linux (fedora 39 with KDE), here both are on separate SDDs. I was hoping to use linux for most things and use Windows 10 for games. But here, I am trying to ...
