Qemu is a cross-platform processor Emulator.

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Why is QEMU so slow even with KVM

I've been working with QEMU for some times now and from my experience I see it being very slow compared to other VM tools like VirtualBox or VMWare. Even enabling KVM doesn't do much of a benefit for ...
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25 views

qemu console text overlapping

I am trying to run the following command in order to run a uefi shell qemu-system-aarch64 -m 1024 -cpu cortex-a15 -M virt -nographic -bios QEMU_EFI.fd -drive if=none,file=hda.img,id=hd0 -device ...
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42 views

Apply a kernel patch [duplicate]

I wantet to ask how to apply the following two patches. https://lkml.org/lkml/2014/5/9/517 https://lkml.org/lkml/2013/5/30/513 I don't see any download for the patch files so how do I apply these two ...
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1answer
1k views

How to install Ubuntu Trusty 14.04 in a qemu virtual machine

I'm running Debian Jessie amd64 with qemu version 1:2.1+dfsg-11 and want to install Ubuntu 14.04 for amd64 in a qemu virtual machine. But the installation process doesn't start because of a kernel ...
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0answers
15 views

OpenVZ - Ubuntu 14 trying to install Windows [duplicate]

I'm following these steps http://freevps.us/thread-2789.html In second step, when I run this command: sudo apt-get install libICE.so.6 libImlib.so.1 libORBit-2.so.0 libSM.so.6 libX11.so.6 ...
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0answers
467 views

Raspberry Pi / ARM Emulation [closed]

I'd like to be able to boot an image of Raspbian Wheezy, for example. I've seen people using QEMU but they have to download Linux source and compile it or accept a pre-compiled one from an untrusted ...
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212 views

Virtual machine won't boot without media. /dev/sr0: no medium found

Ubunto server 14.04, and I created a VM with the OS of win serv 12. But I can't start the VM without the ISO being in the cd-rom. this is my error: error starting domains: failed to open file ...
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226 views

Critical random slowdown issue using KVM/QEMU

I'm having a critical issue with KVM/QEMU which is severely impacting one of my projects and I don't know where to put my hands. I've set up a brand new physical server configured with a 2 x Intel ...
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1answer
258 views

How to export qcow2 KVM image?

I have set up a new QEMU virtual machine through KVM on a Ubuntu 14.10 linux installation. Everything is working smoothly. The problem is when I try to export the qcow2 vm image to another PC, to ...
2
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1answer
2k views

QEMU Connect physical disk [closed]

I made a windows virtual machine on my ubuntu pc using the following script (found online). #!/bin/bash configfile=/etc/vfio-pci1.cfg vfiobind() { dev="$1" vendor=$(cat ...
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0answers
78 views

How to configure VM to mount filesystem share as writable

Here is my situation. I have a host computer running ubuntu server 14.04 It mounts a dev from fstab: /dev/sdb2 /media ext4 rw,nosuid,nodev 0 0 Permissions on the mounted folder are owner=root, ...
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1answer
659 views

qemu: “not a bootable disk”

So I followed exactly the instructions on how to run QEMU-KVM with VMware's disk images v6 directly: kvm -drive file=zimbra-000001.vmdk,boot=on -net nic,macaddr=00:0c:29:c3:93:b9 -net tap -uuid ...
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1answer
10k views

How to correctly install and use QEMU-KVM on Ubuntu 14.04?

In general, I prefer to install Linux software packages (not already installed by the default Ubuntu installer) via the distro-specific mechanism provided by that distro. In my case, I am using Ubuntu ...
1
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1answer
773 views

Mount qcow2 image using qemu-nbd within a container

I'm trying to get an OpenStack Nova compute node running within a container to boot a server in a nested container. Everything works fine until I ask Nova in the controller to boot the server. During ...
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2answers
3k views

Why qemu-system-x86 takes 100% of my CPU?

I've changed my old laptop with a new one but I don't understand why using on both virt-manager the qemu-system-x86 on new one takes 100% of CPU when run a vm, while on old one not. The command: ...
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2answers
3k views

QEMU/KVM/Virt-Manager: Passthrough of USB Webcam to Windows 7 Enterprise creates “NEC USB HUB”

I am trying to passthrough my USB Webcam into my Windows 7 Enterprise x86-64 QEMU/KVM guest, which is managed by virt-manager. First I lookup the bus/device ID: $ lsusb Bus 002 Device 008: ID ...
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1answer
4k views

How to change qemu default machine?

I use Kubuntu 14.04 (x86_64 3.13.0-43-generic #72-Ubuntu) with qemu-kvm. $ kvm --version QEMU emulator version 2.0.0 (Debian 2.0.0+dfsg-2ubuntu1.9) How could I change the "default" machine (now it ...
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202 views

qemu: how to select from which hdd to boot?

I want to connect 2 hdds to my qemu virtual machine. One of them is actually a file connected via virtio, and I want it to be the bootable drive. The other is a partition that I want to pass through; ...
0
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1answer
212 views

Where is the list of supported device emulations in KVM?

I am configuring a guest VM under libvirt using virsh edit. The source of the kernel running in the VM is an embedded security device where I have no control over what drivers it comes with. In ...
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332 views

How to install qemu-kvm from source

I previously installed kvm via apt-get. Then I install qemu from source via following steps: wget http://wiki.qemu.org/download/qemu-2.1.91.tar.bz2 cd qemu-2.1.91 ./configure make && make ...
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1answer
2k views

Sharing folder with VM through libvirt, 9p, permission denied

An Ubuntu Server 14.04 Host hosts an Ubuntu Server 14.04 guest via libvirt/qemu-kvm. The system runs fine, but - as guest - I have issues writing to a shared folder (<filesystem>) that drive me ...
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2answers
191 views

Makefile: how to change a specific rule

this is my first question here, I hope to do everything in the right way. I'm a quite new Ubuntu user and if possible I need some help with a specific Makefile. I downloaded QEMU 2.1.0 and I'm ...
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0answers
72 views

Cannot restore a saved machine

I cannot restore a saved machine with both virt-manager and the virtsh restore command: laurent@aspire6930g:/var/lib/libvirt/qemu/save$ sudo virsh restore windows7.save erreur : Impossible de ...
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1answer
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Compile qemu-kvm, kvm - how?

I am using ubuntu 14.04 64 bits and am trying to build kvm - here is what i did according to many messages I saw on this same topic. git clone https://git.kernel.org/pub/scm/virt/kvm/qemu-kvm.git ...
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2answers
238 views

Make bootable image from non-bootable to use with qemu

I hope the question is not duplicate, I didn't find anything helpful by myself. (And sorry for my english) I have a new Raspberry Pi, and I need to install on it an os with some softwares. I ...
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2answers
4k views

Playing game emulators on a virtualized OS (Qemu/KVM)

I'm planning on assembling a machine for development testing and all kinds of software emulation. I already know what to choose in terms of hardware, and my initial idea is installing Ubuntu as the ...
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2answers
739 views

MAAS: Unable to start “Commisioned” nodes

I am having problems while trying to start my first node using KVM (QEMU 2.0.0) and MAAS. Automatic detection worked fine, and during the commission (virtual machine window) I get errors such as: ...
2
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1answer
3k views

How to list all virtual machines created using qemu-system-x86_64?

I am using qemu-system-x86_64 to boot virtual machines on kvm running on Ubuntu 12.04 64-bit desktop. I have a few VM's that are currently running. I want to get the list of all VM's booted using ...
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1answer
3k views

VM runs very slow using qemu

When I create virtual machine using qemu-system-x86_64 , it doesn't even boot up. This is how I boot the VM: qemu-system-x86_64 -m 1024 -name mac -hda ~/Documents/ubuntu1 but when I create the same ...
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1answer
270 views

Error while creating qcow2 file using qemu-img

When I am creating an qcow2 file using qemu-img command I am getting error as librbd.so.1 file not found. When I check for the dependencies that .so file is present in the /usr/lib folder. Can any ...
4
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2answers
933 views

Add armhf as a suppoted architecture for guest KVM VMs (on a amd64 host)

I have an Ubuntu Server 12.04 setup with about 6 KVM VMs running. Guests are all x86 or amd64, host is a 2-socket Westmere Xeon box. Now I want to create a new guest VM but this time the guest VM ...
2
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1answer
139 views

Virtualising ubuntu-server on ubuntu using qemu

I successfully created an qemu image containing ubuntu-server. I installed that image server instance using the "normal" option. When I boot up the image using qemu ubuntu-server-13.10.img -boot c ...
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0answers
605 views

Virtualizing Windows 7 with qemu-kvm SATA Issues

I am working on virtualizing a windows 7 image using kvm on Ubuntu 12.10 64 bit. Here are the specs for my machine: CPU: Intel i7-2860WM ,8G RAM I am using an image created with WinImage of a ...
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2answers
5k views

Error trying to compile qemu from source

I am trying to compile qemu from source to get my hands dirty with its development. I cloned the package from the repository. I extracted the tarball and started with the configuration using ...
4
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1answer
3k views

Why am I getting a black screen when booting VM using qemu?

When I try to boot a virtual machine using: qemu-system-x86_64 -m 1024 -cdrom /host/iso/ubuntu-13.10-desktop-amd64.iso -name mac -hda ~/ubuntu Iget a black screen just after the installation ...
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0answers
145 views

How to get qemu binaries for mips

I am a new user for qemu. I successfully compiled for my system (x64) but when I tried to compile it for mips it generate error that Why I think that is there any way to get already compiled binary ...
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1answer
267 views

How to define clone presets to virt-manager

When using virt-manager 0.9.1 to clone existing machines, it ignores that the virtual disks are qcow2 compressed and sparsed. The cloned virtual disks are non-sparsed and in raw format. I know about ...
0
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1answer
2k views

qemu-img: error while reading sector 327680: Invalid argument

I am trying to convert vmdk image to raw format but I am getting an error statement. qemu-img convert -f vmdk Ubuntu-12.04-LTS-Jeos-1.0-disk1.vmdk -O raw myImage.raw and I am getting following ...
3
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0answers
309 views

How do I make wireless bridged networking work with linux guest in kvm/qemu?

I am running the ubuntu 13.10 cloud image on kvm/qemu. The guest networking works fine operating in NAT mode when on wireless. Wired bridged networking (eth0 + macvtap) works fine as well. When ...
3
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0answers
363 views

Very slow speed while mounting via SSHFS

My host is ubuntu 12.04. My guest is vanilla 3.0.33 kernel with custom rootfs. I have encountered the subj problem, while mounting host folder on the guest machine via sshfs. sshfs ...
1
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1answer
171 views

Linux-KVM “broken” after a motherboard swap

I just had the motherboard replaced in a Dell PowerEdge R410 that functions as one of our virtual servers (running Ubuntu 10.04.3 LTS). I'm fairly new to Linux, and was quite surprised when networking ...
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0answers
94 views

Having issues installing qemu, pixman autoreconfig missing [duplicate]

i dont understand this error message from the "make" function. qemu-1.7.0-rc1/pixman; autoreconf -v --install) /bin/sh: 1: autoreconf: not found make: * ...
2
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1answer
4k views

How to troubleshoot a macvtap network in kvm/virt-manager

I have a virtual machine running under qemu-kvm, on a 13.10 host. I am using virt-manager to define the machine, and I have added a virtual NIC, using the new macvtap driver. I have the following ...
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1answer
1k views

How to open a qcow2 file in Ubuntu 13.04

I have cloudera-quickstart-vm-4.4.0-1-kvm.qcow2 file which I took from this site but I don't know how to play the vm. Could you please give me some hints or introduce me the proper tools?
2
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2answers
6k views

Update Qemu on Ubuntu 12.04

Currently Ubuntu 12.04 comes with Qemu 1.0, I would like to update this to a newer version (1.5/1.6) to achieve maximum performance. However there doesn't seem to be an apt package for versions > 1.0 ...
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4answers
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virt-manager can't connect to libvirt

I'm running Ubuntu 12.04.2 32 bits. The error doesn't show up if I start gksudo virt-manager. libvirt-bin is installed. I don't know how to check for the daemon. I am a member of libvirtd. ...
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1answer
405 views

How can I emulate an amd64 system on an i386 system?

Is there a way to use virtualization to emulate an amd64 system on a system running with an i386 CPU, or with an amd64 capable CPU running an i386 kernel? I tried using virtual-manager to set up an ...
4
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1answer
1k views

KVM or QEMU_KVM or QEMU_SYSTEM_x86_64 on Ubuntu 13.04

I have a clean fresh updated install of 13.04 server with no graphical display just CLI. I want to run a couple of Windows and Linux guests so did some research and it looked like KVM was the way to ...
3
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1answer
11k views

“ERROR: zlib check failed” while compiling Qemu

I recently formatted my PC and reinstalled Ubuntu 13.04 via Wubi in Windows. And after updates I'm getting this error: basel@ubuntu:~/Desktop/qemu-1.6-test$ ./configure ...
0
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1answer
649 views

Unknown Filesystem Type 'msdos'

I'm trying to mount a disk image with FreeDOS I have so I can move some old DOS programs over to play through QEMU as a test for a friend who has to use DOS programs at her work. When I try to mount ...