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

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Problems switching to QEMU control panel with -nographics

It seems that the terminal does not recognise CTRL+ALT+2 when typed, so I don't know how to quit the QEMU emulation, or switch to the QEMU control panel. I am running Mac OSX Lion, and I type $ qemu-...
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Virtual machines: QEMU, virtualbox

When I use virtual machine on my i5 laptop, does it emulate every instruction or does it run normally? How much is speed decreased? Especially I am interested in QEMU and virtualbox, how do they work? ...
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4k views

How to convert a VirtualBox virtual machine to QEMUwto image?

How do I convert a VirtualBox virtual machine to a QEMUwto image?
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2k views

linux 'top' not showing all processes

I am running linux top command to see processes running inside qemu VM. Sometimes, a process does not appear in them, but if I run, ps -eo psr,pcpu,comm | grep myprocessname then the process is ...
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5k views

Error while creating a VM using KVM

I am trying to set up a VM on my Ubuntu 13.04 Desktop and it's giving me error when I try to start the VM. The error states: virsh # start vm1 error: Failed to start domain vm1 error: internal error ...
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Emulating PPC Arch on linux

I am currently trying to get a PowerPC architecture emulated running using qemu-kvm on my centos box. I currently have qemu-kvm installed however I see a lot of tutorials https://gmplib.org/~tege/...
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779 views

Unable to resume KVM guest after rebooting host

I'm running KVM on Linux Mint 17.1, kernel 3.16.0-31-generic. The only guest is a Windows 8.1 VM. I've noticed that if I reboot the host while the guest is running, I'm unable to resume the guest ...
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1k views

GDB breakpoint problems attaching to QEMU

I have the following problem: When I connect gdb to qemu for debugging, it won't break on breakpoints. I can set breakpoints, break with ctrl+c etc. Any clues how this can be fixed? I have: $ qemu -...
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How to create a fixed size virtual disk with qemu-img?

What's the best way to create a fixed size disk with qemu-img ? I tried doing this., and it always seems to be creating a virtual /growing disk, doing a ls returns the actual small size of the vmdk. ...
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122 views

Will QEMU emulate processors newer than the one in which it's running?

If I compile QEMU in Linux running on a 486 processor, will it be able to emulate the Pentium processor features on it (like MSR)? And, if it doesn't, is there any way to emulate the Pentium features ...
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840 views

Is it safe to uninstall qemu and libvirt?

Fedora installs both by default. I didn't found what are them exactly for, but yum autoremove selects them for autoremoval. Is it safe, for a normal user (I mostly use this machine for documents and ...
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2k views

Write qemu booting virtual machine output to a file

I've been trying out qemu to play around with some VMs. It's working well but I keep wanting to be able to view the text (linux boot process) that quickly scrolls by in the qemu window on startup of ...
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1answer
3k views

How to use qcow2 disk image in Linux?

I have a large qcow2 formatted disk image, which I use as storage. Often I need to move data to and from this disk image. I mount the disk using the qemu-nbd tool as follows: modprobe nbd max_part=63 ...
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11 views

accessing core microarchitecure in QEMU, HOW?

I have two questions: 1) Is QEMU a full system simulator or a virtalization layer? 2) when it installed, Is it possible to access micro architecture elements of a core such as registers ,...? I need ...
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36 views

qemu: emulated nic is too fast

On archlinux, I started a VM with qemu emulating a rtl8139 network card by giving it the following parameters: -device rtl8139,id=nic0,netdev=tap0 -netdev tap,id=tap0,ifname=tap0 After booting the ...
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1answer
18 views

Creating a libvirt URI to hop to another host

I have a Qemu-Host running libvirtd which is properly configured (h0). I can only access this host via another machine (c0), which only acts as a gateway. Now I need to know if it is possible to get a ...
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703 views

Unable to configure KVM (Qemu or Libvirt) on openSUSE Leap 42.1?

I simply want to run multiple VM (not at the same time). I want them to be stored in another partition (mounted here /run/media/shark/VM) and not in the default storage pool /var/lib/libvirt/images/...
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367 views

Need qemu to run headless on host, but still forward graphical output via x11

I have a headless host with qemu installed. I can ssh into the host, and forward x11 so I can view graphical output. However, when I try to run qemu, I get the following error: Could not initialize ...
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15 views

VM inside host VM cannot see avx cpu flag

I have an Ubuntu 14.04 server installed on a VM inside VirtualBox. This VM acts as my host for other VMs. I ran a Linux based image using qemu inside this host VM. The host VM has cpu flag avx but the ...
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94 views

Centos 7 KVM cifs mount issues

I am having a issue with Centos changing my KVM images folder from the default to a Cifs Shared folder. Any time I try it, it returns a error like so: [root@localhost Centos_Atomic]# systemctl status ...
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25 views

What determines the name QEMU will give a drive?

I am playing around with GRUB 2 as a BIOS for QEMU. I expected that I could just use hd0,msdos1 as the root for GRUB, but it looks like it is not that simple. When I boot a VM with qemu-system-x86_64 ...
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140 views

How can I run Qemu with the “-nographic” option in Mac OS X?

Does anyone know how to run Qemu with the -nographic option in Mac OS X? The idea is to use the native Terminal for a text based operation instead of running inside Qemu’s own window. The -nographic ...
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251 views

qemu virtual machine send desktop switching command to host

I would like to set up qemu/virt-manager/spice so that I can run a VM full-screen on its own KDE virtual desktop. I have ctrl-alt-{up,down} set up as desktop switching shortcuts, but I need a way to ...
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100 views

qemu apt-get error failed to fetch

I am running a qemu terminal and trying to scp files into it. In qemu, I am running a linaro release. I have configured /etc/network/interfaces with auto eth0 iface eth0 inet dhcp I have also ...
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611 views

How to configure Portforwarding on KVM Hypervisor?

I have a Debian install 3.2.68 with KVM/qemu/libvirt as hypervisor. In "/etc/network/interfaces" I only see eth0 with my static ip, but if I enter "ifconfig" I see also an "virbr0" interface with the ...
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599 views

qemu-kvm Windows 7 GUEST with vga passthrough doesn't work

Ok so I have a qemu-kvm Win7 VM setup. When setting it to use the standard vga output "-vga std" it works fine. Windows loads up, displays, no problems. If i set -vga none \ -device vfio-pci,host=...
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180 views

How to get a list of connected NBD devices on Ubuntu?

Looking at the man pages for nbd-server and nbd-client and qemu-ndb I don't see any way of listing what NBD devices are connected. Is there a way of doing this? The closest I can find by ...
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257 views

Windows 98 networking doesn't work in QEMU

I installed Windows 98 in QEMU. I want to run networking in user mode. I start it with qemu-system-i386 win98.img -m 256 -soundhw sb16 so it should be using default network hardware and probably ...
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172 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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29 views

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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229 views

Using QEMU to install DOS on the second partition of a real HDD - Can it be done?

I've recently been trying to put DOS on an old HDD I've got lying around. Trouble is, it's already got Windows 98 on it. I resized the 98 partition down and made another for DOS. This is where I hit ...
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218 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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326 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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953 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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280 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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587 views

How to start QEMU on Windows with monitor enabled?

I've downloaded the latest 64-bit version of QEMU for Windows and it installed fine. However, I now have problems switching to Monitor mode when trying my code. The documentation says Ctrl-Alt-[1, 2, ...
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93 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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176 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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845 views

QEMU and the Raspberry Pi

[I re-titled this for posterity, since it does turn out to be somewhat raspberry-pi centric] I'd like to try QEMU as an alternative to cross-compiling. I'm using v. 1.0.1 on fedora 17 [later: same ...
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109 views

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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2k views

Boot an existing GNU/Linux installation from a real HDD in Qemu-Windows

I'm now running windows 8 and I installed qemu-windows 1.3.1. I have two hard disks. When I try to boot existing Arch GNU/Linux from second disk using the command: qemu-system-x86-64w -hda \Device\...
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181 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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746 views

Network setup for web development on KVM guest with host using wifi

I've a laptop running Linux connected to a LAN using wifi. I've used virt-manager to create a KVM/QEMU VM and installed Ubuntu on that. As expected, it can connect to the Internet to download updates, ...
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4k views

Cannot open SDL support on Qemu

When I compile qemu for arm platform, I configure as follows: ./configure --cross-prefix=arm-linux-gnueabi- --target-list=arm-softmmu --enable-kvm --enable-sdl --static But get errors below: ERROR:...
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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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837 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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136 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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300 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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747 views

Drive not recognized by linux when launched from qemu

I'm attempting to boot a linux kernel, ramdisk, and a drive using qemu: qemu -initrd ramdisk.cpio.gz -kernel mylinux.i686 -m 1024 -append console=ttyS0,38400 -serial file:serial.out -hdd raw.img ...