Questions tagged [xen]

Questions related to Xen Project, which creates a hypervisor or Virtual Machine Monitor (VMM). A hypervisor allows one machine to run multiple virtual guest operating systems simultaneously.

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snowflake shows at the beginning of boot and reboot a ubuntu 2204 VM on Xen (Only UEFI/Secure boot)

The boot process below includes a step displaying a snowflake, which is not present in the BIOS boot process.
3 votes
5 answers
2k views

XEN cannot start domains after upgrading from 18.04 to 20.04

Dom0 wrong xl list Name ID Mem VCPUs State Time(s) (null) 0 31898 8 r----- 27.7 starting of ...
1 vote
2 answers
9k views

xen hypervisor wont boot from grub and "Can't find hypervisor information in sysfs!" error ubuntu 14.04

I have used This forum, trying to run xen on my os: steps i have done : egrep '(vmx|svm)' /proc/cpuinfo ouput = 4 and also i have run KVM virtualization with no problem. then: sudo apt-get ...
6 votes
1 answer
1k views

Is the "linux-firmware" package actually required on a XEN VPS?

This package is half a gigabyte so I'd like to determine if it's truly needed. I'm having trouble understanding why it would actually be required on a VPS, and no other packages depend on it, however, ...
0 votes
1 answer
149 views

Repository to download Xen Hypervisor

I'm trying to install Xen hypervisor by command, but everytime I followed instruction on internet its returned with this error E: Unable to locate package xen-hypervisor I have tried to find ...
1 vote
1 answer
218 views

Xen/Ubuntu: Host to Guest Bridge Traffic Problem

Problem. New Ubuntu/Xen host/guest combos seem to work perfectly except for a lack of host to guest ethernet traffic flow. Specifically. I create xen hosts and guests using the default/routine ...
0 votes
0 answers
543 views

Ubuntu 22.04 LTS Server Xen server doesn't boot after upgrades

Yesterday I did some regular patches on my Xen hypervisor running Ubuntu 22.04 Server. After the apt update / apt upgrade the server didn't boot into Xen anymore. It's stuck trying to mount my root ...
0 votes
0 answers
827 views

Xen Hypervisor boots to a black screen after installation

I wanted to try virtualization so I went with Xen and followed this guide: https://help.ubuntu.com/community/Xen I got to the second command which says Now reboot: $ sudo reboot During rebot, grub ...
0 votes
1 answer
1k views

Ubuntu 20.04 with xen 4.11 domU panic with pci passthrough

I started to upgrade my server from Ubuntu 18.04 to 20.04. After reinstalling xen / qemu in the dom0 XEN cannot start domains after upgrading from 18.04 to 20.04 dom0 and all domU instances worked as ...
0 votes
0 answers
735 views

How to create and start Xen guest VM by qemu-system-x86_64 command

I have built & installed Xen 4.15 onto my Ubuntu20.04 platform successfully according to https://wiki.xenproject.org/wiki/Compiling_Xen_From_Source After reboot, I entered Domain 0 successfully. ...
-1 votes
1 answer
203 views

Ubuntu Server 20.04 Crashes when using premade MBR partitons

I'm attempting to install Ubuntu on 150GB MBR disk with 3 partitions /boot 1GiB swap 8GiB / 140.9GiB The moment the installer starts the format it crashes. Does anyone know what might be the ...
0 votes
2 answers
2k views

Copying modules to another system

I configured and made a custom kernel from vanilla kernel downloaded from kernel.org. Now I ported it to another machine with simple 'vmlinuz' and 'initrd.img' copying and some grub config done. (...
1 vote
0 answers
467 views

Cannot boot Xen: secureboot forbids loading multiboot2 module

I've installed xen-hypervisor-4.11-amd64, now I wish to boot Xen. I can't. When I choose corresponding entry from grub I receive following message: Loading Xen 4.11-amd64 error: Secure boot ...
3 votes
2 answers
1k views

How can I create the smallest possible mirror of the archive?

I need to create an http url at my laptop to have a Ubuntu installation in my laptop on a Xen environment. This is what the final thing will look like. The host and client are both going to be my ...
0 votes
1 answer
301 views

How to stop loading Xen 4.9-amd64 on boot

I installed xen on ubuntu following this question. Now, when I boot ubuntu 18.04, it takes ages and it says in the beginning: Loading Xen 4.9-amd64 ... WARNING: no console will be available to OS ...
3 votes
2 answers
3k views

Grub warning- xen

When I run update-grub I get the following warning on my Ubuntu KVM hypervisor: Including Xen overrides from /etc/default/grub.d/xen.cfg WARNING: GRUB_DEFAULT changed to boot into Xen by default! ...
1 vote
1 answer
103 views

After upgrading a VM to 12.04 my eth0 MAC is all zeroes

I did a series of upgrades from 10.04 to 12.04 on a VM under Xen virtualisation. Now for some reason eth0 won't start up, ifconfig says mac address is 00:00:00:00:00:00, I've tried setting the address ...
1 vote
3 answers
1k views

Unable to add disk devices for domU after kernel update 5.4.0-67

Running Ubuntu 20.04.2 LTS with xen 4.11 After the last kernel update 5.4.0-67 and a server restart none of the guests were started. Trying to start a domU manually I got the following error message: ...
1 vote
0 answers
123 views

Recompiling PV kernel: unable to get domain type for domid=4

After a few attempts I have managed to get Xen up and running on my device, with an Ubuntu focal dom-0. I set up a PV guest ubuntu-focal instance, and am able to use it as expected. I'd like to ...
0 votes
1 answer
721 views

Web-based Xen hypervisor

I want to make users able to create and manage virtual machines from a web-based interface. I have installed Xen hypervisor on my Ubuntu machine I have installed Apache webserver and all the other ...
0 votes
1 answer
1k views

Xen vs dual-boot for games

friends! I'm using Ubuntu for making games, browsing net and anything I could ever do and I really like it. However, there is a little problem. My favourite game series Resident Evil doesn't run well ...
10 votes
2 answers
22k views

Bridging: Losing WLAN network connection with 4addr on option - Why?

Question: For use with my Xen VM, I need to create a virtual network interface (vif) that is bridged to wlan0. If in /etc/network/interfaces I add auto xenbr0 iface xenbr0 inet dhcp And then ...
0 votes
1 answer
1k views

Xen not in grub menu after do-release-upgrade to 20.04

I have a server on which I run a number of Xen VMs. I recently upgraded from 16.04 through to 20.04. Unfortunately, Xen is no longer showing up in grub as a boot option. I only see: Ubuntu Advanced ...
0 votes
1 answer
389 views

How to add space disk to VM Ubuntu 16.04 on Xen server

I have an Ubuntu 16.04 VM on Xenserver. I add a disk extension to it to increase its storage capacity. I added a disk on Xen, but the problem is that the Ubuntu VM does not detect the added disk ...
2 votes
0 answers
1k views

Ubuntu 20.04 with ZFS root fails to boot after installing xen

I did some Google searches but failed to find anything for this problem. After installing 20.04 using the ZFS root option I installed Xen. When it rebooted it failed in initramfs with the error "...
4 votes
1 answer
1k views

Upgraded from Ubuntu 18.04 to 20.04. Xen now has problems with hvm VMs

Problem 1: pv VMs running Ubuntu Linux would run but not connect through bridging until I added net.ipv4.ip_forward=1 to sysctl.conf (and rebooted). Unsure why I now need this but looking at issues ...
0 votes
0 answers
503 views

Why can't I book xen hypervisor on Ubuntu 20.04.1? panic on cpu 0 timer doesn't work!

As the subject says I simply cannot boot into the hypervisor. I'm able to install it just fine though, it says something about the CPU when I try to boot and quickly just reboots. I have ...
1 vote
1 answer
4k views

socket to '/var/run/libvirt/virtxend-sock': File o directory not found

I'm running xen on ubuntu 20.04 and I'm trying to create a new xen connection with virt-manager,but it does not work,because the error : "failed to connect socket to '/var/run/libvirt/-virtxend-...
0 votes
0 answers
600 views

libxenlight state driver is not active

I'm trying to create a new xen connection with virt-manager. At the beginning it didn't work because this error : "failed to connect socket to '/var/run/libvirt/-virtxend-sock. file or directory ...
6 votes
1 answer
2k views

boot XEN under UEFI-only BIOS

Is there a way to get XEN 4.4 booting from UEFI mode BIOS? My AMD64bit laptop does not support direct CSM/legacy boots. A nasty workaround has been to boot from a specially made USB pendrive with ...
1 vote
0 answers
121 views

Furher help on Xen and USB passthrough

I know that this is a long-shot, but I have not been able to obtain any help from the Xen community so I wondered if anyone in Ask Ubuntu may be able to help? I have manged to get Xen installed and ...
1 vote
1 answer
1k views

Install Ubuntu 18.04 LTS on Xen hypervisor with linux kernel 3.18

Is it possible to install Ubuntu 18.04 LTS on a xen hypervisor platform with a 3.18 kernel? Does the xen hypervisor's kernel need to be the same or higher then the installed guest? Thank you in ...
0 votes
0 answers
169 views

Installed Xen and now computer won't boot

I recently installed Xen on Ubuntu 19.10. When I rebooted my computer to use it Grub automatically booted as usual, but this time I got the error code on my main Samsung 1TB hard drive that the ...
0 votes
1 answer
259 views

how to check if Xen support hardware virtualization?

I am try to check if xen in ubuntu 18.04 support virtualization. By following this comand: $ xm info | grep caps I am follow step 5 of this tutorial: Check virtualization capabilities The output ...
0 votes
1 answer
1k views

Directory 'mc/etc' does not exist

I am try to configure gateway. I am follow step 4 of this https://trueconf.com/blog/knowledge-base/configure-xen-hypervisor-ubuntu-server-14-4-05.html When I open to edit mc/etc/sysctl.conf file I ...
2 votes
1 answer
2k views

Unable to change display resolution Ubuntu 18.04 on Xenserver VM

I'm using Dell T410 server with Free version of Xenserver 7.4, i installed Ubuntu 18.04 VM all went well but i'm unable to adjust the resolution from ubuntu settings, showing just 800X600, see ...
7 votes
2 answers
33k views

How to install Xen-Tools on Ubuntu Server LTS 16.04 with Xenserver 7?

I tried several methods. sudo apt-get install xen-tools is installing at least two packages but cannot configure / start them for unknown reason. Source Using the iso provided by Xencenter (...
0 votes
2 answers
105 views

Problem with creating a PV-ubuntu-guest with Xen on slackware

I don't know if I'm in the right place but: i have Xen installed on slackware and i wanted to create an Ubuntu-Guest-Domain. I created the xen-config-file(attached) manually and created a new guest ...
3 votes
1 answer
8k views

How to fix error 'libxenlight failed to create a new domain'?

Using Virt-Manager 1.2.1 on 14.04. / Xen 4.4 from repos. Cannot create VM machine because this error crops up on virt-manager. This is after editing /etc/xen/xend-config.sxp to allow virt-manager to ...
0 votes
0 answers
51 views

Sharing internet between Host and guest xen

I am using Ubuntu 14.04 as host machine,want to create bridge so that guest OS can access the WiFi Internet access. If a have understood correctly brctl utility is used to create bridge for Ethernet ...
0 votes
0 answers
2k views

New Ubuntu 18.04 xen 4.9 VM will not boot (LUKS setup) - fails back to initramfs

On a fresh Ubuntu install with Xen (learning Xen, proficient with Ubuntu), I try to create a domU PV VM with LUKS encryption, the whole setup procedure goes smoothly, including creating, unlocking the ...
0 votes
1 answer
8k views

Installation of 18.04 Bionic fails on XenServer7

I tried to install Bionic server as a guest on XenServer 7.0. After booting the iso I get a black terminal saying: vbd vbd-5696: 19 xenbus_dev_probe on device/vbd/5696 And that's it. Did anyone ...
0 votes
1 answer
321 views

Pass-through of Marvell 88SE9230 to Xen guest with AMD-V iommu

I have a Gigabyte GA-970A-DS3P board with a AMD FX(tm)-8350 cpu. I have IOMMU enabled in the BIOS. For the non-XEN linux boot I pass iommu=pt amd_iommu_dump as a kernel argument and can verify that ...
1 vote
1 answer
2k views

Help please with XEN PCI-device passthough

I have problem with PCI passthough in XEN. kernel: 4.15.0-23-generic CPU: Intel Core i7 - saw specifications on Intel website: it supports VT-d, VT-x and all other technologies! Checking XEN is ...
0 votes
1 answer
104 views

Xen DomU with > 520GB memory

i am currently trying to assign 750GB Ram to a DOMU running on our Xen server. Even though the overview states that the DOMU has 750GB RAM, inside the Guest there are only around 520 GB available. ...
2 votes
1 answer
977 views

Xen boot fails on HP Z8

I followed the instructions in https://help.ubuntu.com/community/Xen. Well, the first two steps. After the reboot, I am presented with: Loading Xen 4.9-amd_64 ... WARNING: no console will be ...
0 votes
1 answer
6k views

Why is having an error initializing AMD-Vi?

I have a Ryzen 5 1600x CPU with a MSI X370 Gaming Pro Carbon motherboard, which 100% supports I/O virtualization. When I boot in Ubuntu without Xen I can see: me:~$ dmesg | grep IOMMU [ 1.074675] ...
5 votes
2 answers
21k views

How do I set up a xen bridge?

I have been reading various pages on how to set up the network for xen. Unfortunately, none of them actually have a full example config. They clearly show what the xenbr0 section should look like, but ...
0 votes
1 answer
297 views

Qemu vs. Xen(Qemu): virsh can't find qemu

Im running following setup build from source: libvirt Xen(quemu was part of Xen build process) virsh vol-create qcow2 Responds to me: No qemu installd, only raw possible. Every solution pointet out ...
3 votes
2 answers
5k views

Why do I get disk I/O errors booting the 3.2 kernel on a xen vps server? [closed]

I have a xen vps, which I just upgraded to the new LTS 12 Precise Pangolin. However, I see this error on booting: [ 12.848076] end_request: I/O error, dev xvda, sector 12841 [ 12.848093] ...