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

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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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6 views

touchscreen passthrough for windows 8.1 qemu slave

I have a windows 8.1 vm running via kvm/qemu on an ubuntu 14.04 touchscreen laptop host. I can pass use my touchscreen as a regular mouse pointer if i pass through -usb -usbdevice tablet in the qemu ...
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56 views

vga-passthrough with kvm/qemu on optimus-capable laptop

i have an asus n550jv laptop with the following output from lspci -nn | grep "VGA|3D": 00:02.0 VGA compatible controller [0300]: Intel Corporation 4th Gen Core Processor Integrated Graphics ...
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How can I have different ip address on qemu vm with wireless host machine?

Because wireless doesn't support network bridge, I can't use bridged networking like virtualbox do. I'm running on arch linux with NetworkManager managing connection. Almost every possible way that I ...
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11 views

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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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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91 views

QEMU guest system starts off /dev/sdc but won’t start from disk image file

I have a copy of Windows XP installed on a hard drive which I would like to run with QEMU. When I start it directly from the HDD it runs fine: qemu -m 256 -hda /dev/sdc Starting ...
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1answer
23 views

Mount or extract data from LVM partiiton inside of a RAW IMG File?

I have a raw disk .img file (running file indicates that it is a "DOS/MBR boot sector" file). Running mmls produces the following output: DOS Partition Table Offset Sector: 0 Units are in 512-byte ...
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15 views

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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14 views

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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32 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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23 views

Can we say that QEMU is a Virtual Machine?

What I perceive as a Virtual Machine is that it simply allows to load another Operating System side-by-side on its own sandboxed environment. It is limited to the same hardware architecture as the ...
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11 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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86 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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54 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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24 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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57 views

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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22 views

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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24 views

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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1answer
57 views

Why does my networking work while installing os in qemu but doesn't when I boot

I have a qemu system running arch-linux. While installing the device with: qemu-system-x86_64 -hda arch.img -boot d -cdrom archlinux-2014.12.01-dual.iso -m 1024 I can access the network from qemu ...
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50 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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87 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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176 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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27 views

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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116 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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1k views

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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290 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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1answer
235 views

iPod Touch 5G won't recognize in qemu Windows 7 VM

I have an iPod Touch 5G, and a Windows 7 VM. I am trying to pass through the iPod Touch to the VM so Windows can recognize it, but I am getting the following error in the qemu monitor. (qemu) ...
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18 views

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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117 views

qemu + centos 7 - cpu tuning in not available on this host

I am running OpenNebula on Centos 7 hosts - one host is fully operating the other two says: error: unsupported configuration: CPU tuning is not available on this host I've got through some git code ...
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1answer
80 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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1answer
84 views

Unable to start VM from php

From a php page I am trying to start Virtual Machine using virsh tool on KVM hypervisor but I am getting this error. error: Failed to connect socket to '@/var/www/.libvirt/libvirt-sock': Connection ...
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1answer
2k views

How to build a portable windows virtual machine without admin permissions and with high performance?

I need to build a portable virtual machine that could be used on user restricted PCs that need admin permissions. I've heard about QEMU. But the problem is that it is very very slow when running. Is ...
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20 views

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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72 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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1answer
2k views

Unable to configure qemu on Ubuntu 14.04

I'm trying to configure QEMU on Ubuntu 14.04 (x64): $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 14.04.1 LTS Release: 14.04 Codename: trusty ...
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1answer
166 views

Why is [ssh,scp,rsync,etc] so slow, from a VM to another local machine on my gigabit local network?

I have a VM A running the latest archlinux with QEMU, KVM and a Virtio network card. It is a buildbot and it needs to drop the result on another machine B on the local network. The VM is started with ...
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1answer
3k views

How to mount KVM virtual machine image to VirtualBox?

I have received a .img file of a server which is a Virtual Machine running in a KVM environment. The Virtual Machine has Ubuntu installed. I would now like to take this .img file and "emulate" the ...
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97 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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271 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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205 views

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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2answers
145 views

Qemu user mode networking doesn't work

I try to use network in guest system. I installed an OS in a virtual machine, but I did not get the network configured. When I try to ping, for instance google.com I get the IP address for the domain, ...
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1answer
1k views

Install Windows Server 2012 R2 in qemu VM

I'm trying to install Windows Server 2012 R2, but right after loading Windows files I'm getting: Your PC needs to restart. Please hold down the power button. Error Code: 0x0000005D My command is: ...
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90 views

QEMU guest and Linux host networking configuration

+-----------------------+ +---------------------+ | bro - Host - Linux | | Guest - QEMU- Linux | | +------+ +------+ | | eth0 | | | tap0 |----| eth0 | | ...
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1answer
94 views

Weird output from linux `top` command

I got a weird output from command top, which shows the summation of the RES column is greater than my physical memory. For instance, I have a host with 64G physical memory and the swap partition has ...
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1answer
43 views

QEMU outside gateway

I've created two instances of CentOS6.5 (KVM) using Virtual Manager and I'm able to ping google.com, yahoo.com,etc... However the ip addresses for the instances are 192.168.0.* and the machine that ...
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76 views

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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583 views

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. ...