Linux Kernel Virtual Machine is a virtualization system (VM)

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Create a persistent qemu+ssh connection

I am trying to make a script that will list the VMs on my four host servers, and dump the xml for guest domains that are running. I am running the script on one host server, and using qemu+ssh to ...
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238 views

Networking Issue with libvirt (kvm)

I'm running a desktop class computer tower with Ubuntu Server 13.04 (64-bit) installed. The server is configured with libvirt, and I use virt-manager to control and configure the VMs as well as ...
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Virtual Machine stalls after migration

I have Ubuntu VMs running on an Ubuntu server Host. When moving a VM from one host to the other using virsh migrate --live some of the VMs stall out. The only way to get them back is to kill them and ...
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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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2answers
760 views

How can I use a separate partition to store the VM images in KVM?

I have the following setup on my host [root@fake ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda2 32G 30G 785M 98% / tmpfs 12G 76K 12G ...
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Nested kvm virtualization not working

I am trying to run a Ubuntu VM on Fedora 18 host. Now, my processor supports VT, so I have kvm installed and it's working. I launched the machine (Ubuntu 12.04 LTS) and installed kvm inside it. But ...
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679 views

vagrant fails to create box with libvirt

I am trying to setup a box with vagrant and libvirt with the following Vagrantfile Vagrant.configure("2") do |config| config.vm.define :test_vm do |test_vm| test_vm.vm.box = "test" ...
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187 views

How to improve graphical performance of Windows 8 on KVM?

I installed Windows 8 on KVM. But its graphical performance is less than desirable. First I tried to use SPICE protocol to solve this problem, but it doesn't support Windows 8. Next I tried to use ...
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3k 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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1k views

How to ignore a USB device in udev

I want to pass a USB device (to be precise: a smart card reader) to a KVM virtual machine, and therefore have to prohibit that it is claimed by any driver on the host machine. I tried to write a udev ...
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256 views

Boot OpenSuSE installation in QEmu-KVM using QEmu-KVM as the bootloader

I am trying to pass kernel parameters to a virtual OpenSuSE installation without typing them on a boot prompt, using the ability of KVM to load the kernel directly. First, I mount the installation ...
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448 views

oVirt requirements and other web based mgmt tools for kvm

I'm evaluating different virtualization management tools for KVM virtualization. I've a kvm ready server with 32GB ram. I'm looking for web based management tools where different people can ...
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49 views

VM program which stores directly on HDD

I'm looking for a VM program like VMware, LXC, or KVM, which stores the whole hard drive of the guest OS on the host HDD. LXC for instance does this, it stores in ...
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272 views

What VNC clients support qemu's audio extension?

I've read that QEMU implements an extension for providing audio over a VNC connection Unfortunately despite doing a lot of web searches and even installing some different VNC clients and ...
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86 views

Permanently detach device

I'm setting up a vm box and I've enabled IOMMU. Works great, except I get PTE Read access is not set errors flooding my dmesg. In particular it is for one device, a USB 1.1 controller, that just ...
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362 views

freebsd guest works from commandline `kvm`, hangs before boot inside virt-manager

I have a FreeBSD-7 guest (in a qcow2 disk image) which works just fine when I start it from the commandline with # kvm -drive file=freebsd7.disk But when started from the virt-manager GUI, it gets ...
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1k views

Running the same Windows both in KVM and physical

I have kind of an advanced question for you, I would like to install Windows on my hard drive (which is GPT formatted) but I would like to be also able to run it in KVM. To clarify, the same Windows ...
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2k views

Host-only-like interface in KVM

I just migrated from Virtualbox to KVM, everything is very good. But I've a little bit confused in network adapter type. In Virtualbox I have host-only adapter, which are virtual nic (no bridge), and ...
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181 views

Is the ubuntu a VM instance if I choose to install it alongside with windows via the wubi installer?

I recently installed a Ubuntu 12.10 64bit using wubi installer under Windows 8. Every time I start my machine, it will go to the Windows 8 bootloader first and then I can choose which operating system ...
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How do I prevent virt-manager from asking for the root password?

When starting virt-manager, it asks for the root password. It looks like virt-manager causes the libvirtd daemon to run pkcheck with a couple of arguments, which then shows this authentication ...
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1answer
367 views

QEMU: How to find bottleneck in my virtual machine?

I am running an ubuntu virtual-machine on a 12.04 ubuntu server. Unfortunately the machine is extremly slow (just htop consumes 15%), even though having 8 cores etc. Do you know a way to find the ...
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260 views

centos 6.2 VPS system encryption performance

My webapp database handles some user profile data (name, birthday, work and education history, email, facebook id, and also my facebook app secret that would provide any holder access to any facebook ...
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299 views

KVM USB Passthrough and Zydas usb wireless adapter: device or resource busy

i'm tring to setup a kernel testing virtualmachine for a 80211 module. i start my machine with this command: kvm -m 512 -net nic -net vde -usb -usbdevice host:0ace:1215 ktesting.img i set up a ...
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346 views

KVM guest displaying on an attatched monitor

I have a Debian Squeeze KVM hypervisor running a server guest VM and a Desktop guest OS VM. Is it possible for the Desktop guest to send it's display to monitor directly attatched to the computer? An ...
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721 views

KVM machine does not start ssh, network is started, used to work

have been searching an pulling my hear out for the last 6 hours. I have a virtual machine that has been running fine for the last six months. I was happy ssh'ing into it and it was running a database ...
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681 views

How to set up virtual windows so it shares graphic card via IOMMU?

I'd like to continue using Linux as my desktop system. But from time to time I'd like to do some gaming. I know that I can use Wine and PlayOnLinux stuff, but it doesn't always work. I also know, that ...
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Prevent radeon driver from attaching to specific PCI devices?

I have two Radeon cards in this machine, a 6570 and a 6950: lspci | grep VGA: 01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Turks [Radeon HD 6570] 02:00.0 VGA compatible ...
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1k views

libvirt/9p/kvm mount in fstab fails to mount at boot time

I am trying to mount a shared folder using qemu-kvm/9p and it fails to work if I add it to the fstab file. I get an error at boot that the device cannot be mounted, yet after start if I run "mount -a" ...
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Virtual Machine Got Frozen on start of installing FreeBSD, on CentOS6.3 KVM

Problem description: In the installation section, after I entered the virt-install command with proper arguments(shown below) to build the virtual hardware configuration, and connected to the vm ...
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115 views

Guest slow after being idle for awhile

I've been playing with ESXi and Linux KVM to try to find out which one best suits our needs. With both of these solutions I've run into the same situation. After a guest has been idle for some time ...
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Windows 7 Enterprise under virtualization has no networking until login

I created a Windows 7 image to run under KVM based virtualiztion, but the networking for the image will not start until I login. I'm not very familiar with Windows, but it seems as though there is ...
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2k views

KVM module not found by virtual machine manager

On ubuntu when I launch the virtual machine manager I get a warning saying that KVM is not installed. I installed it from apt-get. Ran modprobe and got: $ modprobe -l | grep kvm ...
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380 views

How to set up linux watchdog daemon with Intel 6300esb

I've been searching for this on Google for sometime now and I have yet to find proper documentation on how to connect the kernel driver for my 6300esb watchdog timer to /dev/watchdog and ensure that ...
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295 views

Reducing hard disk access of kvm

I have set up a kvm/qemu virtual machine on my home server (Ubuntu Server 12.04). My host system is installed on a small SSD but the image for the vm (virtual disk file) is saved on a classic HDD. ...
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60 views

error in qemu monitor wavcapture with virsh

I have VM running on qemu-kvm. I am managing it with libvirt and command line tool virsh. I want to record the audio output of the VM. Here is what I am trying - virsh qemu-monitor-command -hmp ...
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Convert KVM virtual machine to LXC container

I have 2 virtual machines (with Debian, using KVM) with virtual hard drives: /srv/kvm/ssh.img /srv/kvm/www.img Both have 3 partitions (/, /home, swap). I want to convert them in a RootFS usable ...
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311 views

Is it possible to run KVM from a virtual installation of RHEL 6?

I am currently studying for the RHCSA exam that requires me to practice with KVM. Is it possible to run for me to run KVM on an RHEL 6 virtual machine before I go to the trouble of partitioning my ...
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Mouse movement in KVM is much slower than VirtualBox, any work arounds?

I'm running KVM in latest Ubuntu, mouse seems pretty slow compared to host machine, the cursor looks "heavy" to me, Anyone know what could possibly wrong ? I use a wireless mouse that connects ...
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573 views

How to enable Virtualization Technology in Samsung Chromebox

I need to enable Virtualization Technology (VT) in my Samsung Chromebox (Series 5) from Google IO 2012 because of Android x86 emulator from Intel. I am on Developer BIOS, but I have no clue, how to ...
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1answer
807 views

Can kvm guest get more CPUs than it has?

When I run a vm with a single virtual CPU inside KVM, is it possible that the vm can actually get more CPU cycles than one whole CPU can has, if there is no other vm running in the host? In another ...
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402 views

low usb speed file transfer using KVM host CentOs

i'm using qemu-kvm(1.1.1) to run a Windows 2008 R2 Virtual Machine. The host machine is running CentOs 6.3. I'm exporting a USB 2.0 Hdd device to the VM using USB-redirection with spice channel. So ...
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2k views

Is there any way to run 64bit Virtual Machine on 64bit processor without hardware virtualization (amd-v, vt-x)?

We have a 64bit virtual machine (CentOS) that we'd like to run on 64bit host-machine (may be running under any OS), but that host-machine doesn't support hardware virtualization, which, you know, ...
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1k views

VirtIO Driver Not Found When Installing Windows 2008 R2

I have been over nearly every guide to installing Windows 2008 R2 in KVM, and have read all that I can about the virtio driver disk, but I continue to get the same result: As you can see, the ...
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2answers
2k views

How to tell if I am on a XEN or KVM Server?

Is there a way to tell if I am on a XEN or KVM linux server? Reason I asked is nothing is on top yet I am seeing load averages high well after I do tasks and I am getting hangs/spikes when I do simple ...
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718 views

Garmin USB device on Win7 under Linux KVM

I have a Fedora 16 installation and I'm using the Garmin Forerunner 610 HRM in the virtual machine. The problem is that I need to allow Windows 7 direct access to the USB stick that communicated with ...
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518 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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Is it possible to run a Windows partition as a VM?

My laptop is setup as dual boot between Windows 7 (64-bit) and Ubuntu Linux (64-bit). Because I spend most of my work time in Linux I need a Windows 7 VM to be able to use Microsoft Office tools, etc. ...
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10k views

virt-manager kvm modules are not available

Fedora 16 latest updates running on a HP Mini 210 with an Intel(R) Atom(TM) CPU N550 @ 1.50GHz Updated answer: ============== sudo yum groupinstall Virtualization Only installed virt-viewer ...
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752 views

KVM with failover setup

We have a server running several virtual machines using KVM. While it works well, we are worried about potential hardware failures on that one physical server. We do backup nightly to a different ...
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210 views

PCI-X card controlled by VM

I have a PCI-X card which I would like to assign to one of my VM guests. I am using Ubuntu 10.10, with libvirt and kvm. Is there any way, of completely bypassing the host system, and routing all ...