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

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QEMU within VirtualBox and bridged connections all the way down

I'm trying to get an ARM QEMU system out on my LAN. I tried running QEMU directly from Windows (Windows 7 x64), with success except I could not get a TAP adapter to bridge to my wireless connection. ...
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qemu: Set or force higher screen resolution than 640x480

I set up a virtual machine using qemu-system-arm (ARM emulation) running Debian squeeze. Now I have the problem that in the "Monitors" preferences, I can only select 640x480 as resolution. Tried all ...
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failed to access perfctr msr - When running Fedora on a VM

I'm trying to run a Virtual Machine with Fedora, and I choose to "Start fedora" from a list where I can start it or troubleshoot problems. The I get the following output: [ 0.00000] tsc: Fast TSC ...
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qemu: How to use resolutions > 1024x768 in Windows 8(.1)?

In previous Windows versions, I was able to get higher resolutions in qemu/qemu-kvm by passing the -vga std or -vga vmware command line parameters. However, when I try the same for Windows 8 (and ...
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20 views

How to boot a USB 3.0 SATA HDD inside a Windows 7 Qemu Virtual Machine

I have a Windows 7 VM, that I would like to recognize a SATA HDD that is plugged into a Voyager Q (USB 3.0 "enclosure"). I have tried various commands, and tried logging the output of the command ...
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spicy-client assertion failure after computer crash

I usually use spice-client to connect to remote VMs without any problem. Today during usual work my pc freezed (I am strong confident that this is not due to spice) and forced me to brute shutdown. ...
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70 views

Using directory as initrd in QEMU

Is there a way to use a directory as initrd when booting QEMU? I know how to use the -kernel and -initrd flags for QEMU to boot a kernel and initrd without needing to first create a bootable device ...
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126 views

KVM Arch install - no network

I often use KVM to try out various Linux distros. All I have tried so far get an automatic network, Red Hat and Debian have all connected out of the box, no problem. Makes installations very easy. ...
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133 views

How to forward usb port to guest OS using qemu

I have lots of usb devices and I would like to connect them to guest os. Currently I'm forwarding one device at a time. $ qemu-system-x86_64 ... -usbdevice host:xxxx:yyyy I would like to give ...
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619 views

nova-compute libvirt x86_64 emulator Error

I was trying to install openstackin Ubuntu12.04 server. I find that Nova-compute is not getting started and the error is the below. I followed some of the suggestions in various forums, but nothing ...
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157 views

How to bootstrap a MIPS NetBSD iso in qemu?

I'm trying to bootstrap a NetBSD 4.0 iso in qemu, but am not having much luck. My host computer is running OS X, and I successfully installed qemu with homebrew, but have been unable to bootstrap the ...
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QEMU: weird display output when install debian on mac osx

I got weird display when I tried to install debian on osx 10.9.1 qemu-system-i386 -hda debian.img -cdrom ~/Downloads/debian-testing-i386-netinst.iso -boot d QEMU is the newest version brewed from ...
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45 views

Swapping floppies in FreeDOS+Qemu

I am trying to replace a floppy inside a qemu machin running freedos 1.1. I remove the old floppy and inserts the new using change floppy0. Now when I dir A: nothing has changed. If I try to run a ...
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112 views

Unknown OS hostname and product in virt-manager

I'm using libvirt on a Fedora 19 host, running various Linux guests with QEMU and KVM hypervisors. Using the virt-manager GUI, when I look at the guest Overview screen, in the Operating System ...
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Can QEMU be used on Mac OS X to emulate a one-core CPU (preferably only the CPU)?

Can QEMU do this kind of emulation? On Macs there's no an easy way to set CPU affinity, so this could an interesting workaround for the older programs that don't work well in multi-core environments.
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pulseaudio, in a KVM virtual machine (as root) and your desktop (not root) playing audio at the same time?

How do you get pulseaudio to play sound in a KVM virtual machine (running as root) and your desktop apps (not running as root) at the same time? It seems that by default, it will only play sound for ...
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112 views

-kernel option like in QEMU for BOCHS

I am working on creating my own kernel using C/Asm. I have always used QEMU as my emulator mainly because I can specify -kernel and it boots the kernel directly without a boot loader. I wish to switch ...
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781 views

Running FreedomBox in Qemu

I wanna run the latest FreedomBox image on my Ubuntu laptop. The FreedomBox image is for DreamPlug, a 1.2 GHz Marvell Kirkwood 88F6281 SoC (ARM9E), and my Ubuntu is v12.10 (3.5.0-17-generic i686). ...
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616 views

Virtualized guest vs host CPU usage

I am using qemu with kvm as my hypervisor. I am running a gentoo guest on an ubuntu host. The guest is being given a single processor. When I run a compute intensive job (say empty-loop) I get almost ...
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127 views

Making qemu-based Marss simulation deterministic

I am using Marss cycle-accurate simulator, which uses QEMU. It is a full system simulator and gives both user and kernel stats. However, even if I take only user-stats, the statistics vary a lot ...
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268 views

Using VNC client to access local QEMU VM

I have installed Debian in a QEMU VM and am currently using the default QEMU Manager as the main display, since QEMU allows VNC as the main display. I have a VNC client installed on my PC; can I view ...
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434 views

Trying to run QEMU with a file as hda

I'm trying to run QEMU and use a simple file on the host system as the guest's hard drive. Here's what I attempted so far: $ dd if=/dev/zero of=/home/felix/vm/archlinux.img bs=1MB count=8192 8192+0 ...
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How to setup Windows 7 in Qemu on MAC?

I've installed quemu using homebrew . But in application folder there is no Qemu app. What to do? Im on osx Maverick.
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Unfortunately Blueetooth Share Stopped when setting AndroidX86 with Qemu

I am trying to run AdnroidX86 on Qemu Linux x64. Everything works, installation went fine but I keep getting the error abovre constantly which limits my interaction with the the virtual device because ...
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How to enable bluetooth in Qemu? -Bt option throws and error

I am trying to enable bluetooth with Qemu when running an image (AndroidX86) but I am getting an error. According to the document I can just use the "-bt" switch but that is not recognized by the ...
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28 views

Qemu mouse movement speed

Is there a way to increase the mouse movement speed in qemu? Currently, the mouse in the guest OS is horrible slow even when max speed is set in guest OS. This is the QEMU startup command: ...
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81 views

Control fan speed under linux without nvidia drivers

I have quemu-kvm configuration like this - IGP on host (linux) and Nvidia on guest (windows). I blacklist nvidia drivers under linux (arch dist.). Is there a way to set GPU fan speed under linux ...
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42 views

No outgoing traffic through passthrough network adapter (NIC ) on KVM guest

I have KVM host operated under CentOS 7 and guest with Windows 7 on it. Host NIC is passed to the guest as PCI device passthrough (not bridge, not NAT). Guest detects the NIC (drivers, cable plug, ...
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22 views

VirtualBox on QEMU host?

I have remote access to a QEMU Windows Server 2012 (64 bit) VM with 12 cores @ 2.8 GHz ("QEMU Virtual CPU version 2.0.0") and 48 GB RAM. For a project I wanted to set up a Linux VM on VirtualBox on ...
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How can I emulate Windows Server 2008 R2 with QEMU? / Cannot virtualize Win2K8 R2 using QEMU on Windows Host

I have used precompiled QEMU 2.2.0 (64-bit version) to emulate a PC running Windows Server 2008 R2. The Host OS is Windows 8.1 Enterprise 64-bit, and my CPU doesn't support Intel VT-x so I can't use ...
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qemu ARM: Unsupported syscall: 983040

I'm trying to run a ARM32 binary within qemu but I get seg fault: root@debian:~/squashfs-root# chroot . ./qemu-arm bin/xxx qemu: Unsupported syscall: 983040 qemu: Unsupported syscall: 983040 qemu: ...
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How to emulate pentium 4 with qemu?

Does anyone know if QEMU emulates pentium 4? It isn't in the list specifically, but i don't know about some of the listed architectures. qemu -cpu ? x86 [n270] x86 ...
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25 views

Show qemu command line from virsh

I am debugging a problem with a libvirt VM starting, and I want to see the exact command line that it is going to use to start qemu. Is this possible using virsh or some other utility?
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48 views

OSX + X11 + KVM keyboard mapping

I'm ssh -Xing from my macbook air into a remote linux machine, on which I'm running virtual machines with kvm. Somewhere along the way, something is lost--it says I can press ctrl+alt to release the ...
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173 views

troubles with PCI-E passthrough with qemu on ubuntu: pci-stub/bind says no such device

so im trying to bind my second radeon card to pci-stub, as per instructions for setting up GPU passthrough in here, but once i get to binding the card to pci-stub, it tells me it isnt there. this is ...
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QEMU: Saving space in a “child” image?

I'm not exactly sure what the QEMU terminology is, so I'll clarify that "child" image means an image that has a backing image. I.e, an image that contains the differences between the backing image's ...
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113 views

Getting an already installed Android x86 partition to run on KVM

I have Android installed on sda3, and it boots fine when loaded from Grub with the following commands: set root='(hd0,3)' search --no-floppy --fs-uuid --set=root 977083a6-5762-4064-b860-39429b9e0cf8 ...
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272 views

QEmu with -runas parameter does not connect to user's pulseaudio session?

I am trying to set up a multi-headed workstation with one physical graphics card (pci-passthrough) per VM using qemu 2.1 on a ubuntu 14.10 server. The guest OSes are Windows 7 (also tried Windows ...
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How to make redboot work with different network adapter?

I have several VM's running in libvirt/qemu-kvm and I need to run another one that was given in virtualbox format. I converted images and created almost the same config in libvirtd, VM starts but ...
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Is there an overview of machine and cpu compatibility and smp support for qemu 2.x?

I started an attempt to get an qemu 2.1.2 instance running which uses multple threads and cores of the host CPU and realized that the descriptions of -cpu help and -machine help neither provide an ...
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71 views

Qemu within an ubuntu image(virtualbox) cannot ping the host

Im running QEMU within an ubuntu image (of virtualbox). This virtualbox is installed in a windows 7(host). The problem is QEMU cannot ping the host but it can ping the ubuntu image. Here's some of ...
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92 views

QEMU won't start

I'm trying to run QEMU on Windows 7 and install Windows 95 from a CD onto MyHardDisk.img, with networking and a shared folder between host and guest. When I run QEMU from the command line, the ...
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262 views

“qemu-nbd --create” without sudo

I'm working on a custom OS, and the make recipe I wrote for creating a new disk image requires sudo for connecting/disconnecting the virtual HDD image to a /dev/nbdN device. Because I don't want sudo ...
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QEMU guest and Linux host networking configuration

+-----------------------+ +---------------------+ | bro - Host - Linux | | Guest - QEMU- Linux | | +------+ +------+ | | eth0 | | | tap0 |----| eth0 | | ...
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Creative X-Fi no sound in Windows 7x64 (Passthrough)

I am running a virtual Windows 7 x64 installation with qemu-system-x86_64 and a Creative emu20k2 Elite Pro (Titanium) soundcard passthroughed (with vfio) to the windows 7 machine. I passthroughed the ...
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103 views

Testing Linux Kernel in QEMU gives black screen after brief text

I'm trying to run a linux kernel (version 3.14) I custom built using make menuconfig. I am trying to test it in QEMU and this is the command I am trying to run: qemu-system-x86_64 -kernel ...
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25 views

Making qemu look better

I have a machine running kubuntu, and use qemu to run a VM. It looks really bad as you can see in the screenshot. What can I do to make it better? I prefer solutions that don't require sudo access, ...
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86 views

Virtual machines using wrong IP addresses

I have a host computer (A), running three virtual machines: X,Y and Z. They're under a NAT layer, in which the Host A is the gateway (192.168.0.1/16), and the VM's are respectively 192.168.0.2 (X), ...
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Virtual machine host software

I would like to create a virtual machine running Linux and a couple of network services. This virtual machine should be on a USB stick and able to run on both Windows and Linux hosts, with as little ...
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346 views

How do I install Windows 8 (from an ISO) using Q (qemu)?

I have downloaded an ISO image of Windows 8 from Microsoft Dreamspark and I am on a 27" iMac without administrative privileges. I would like to install and run Windows. The only way I found to do so ...