Arch Linux

jesc516

Member

From: LI,NY

Registered: 2015-01-26

Posts: 72

libvirtError: unsupported configuration: CPU mode 'custom'

Im getting the following error using virt-manager:

libvirtError: unsupported configuration: CPU mode 'custom' for x86_64 kvm domain on x86_64 host is not supported by hypervisor

I have cpu virtualization enabled in the mother and I have used virtualbox and vmware on this pc before but I want to learn qemu/virt-manager now. However I cant get past this error.

Also, when I first start virt-manager and attempt to create a new virtual machine I get the following:

Virtual Network 'default' is not active. Would you like to start the network now?

Im using systemd-networkd for networking.

Any ideas?

Last edited by jesc516 (2017-08-21 02:20:03)

jasonwryan

Anarchist

From: .nz

Registered: 2009-05-09

Posts: 30,426

Website

Re: libvirtError: unsupported configuration: CPU mode 'custom'

https://bbs.archlinux.org/viewtopic.php … 1#p1728381
https://bbs.archlinux.org/viewtopic.php?id=228785

etc...

Moving to NC.

---

Arch + dwm   •   Mercurial repos  •   Surfraw

Registered Linux User #482438

jesc516

Member

From: LI,NY

Registered: 2015-01-26

Posts: 72

Re: libvirtError: unsupported configuration: CPU mode 'custom'

I had to select

Copy host CPU configuration

What is the difference between explicitly defining the cpu architecture vs copy host configuration?

Last edited by jesc516 (2017-08-21 05:12:54)

yotux

Member

Registered: 2018-01-28

Posts: 1

Re: libvirtError: unsupported configuration: CPU mode 'custom'

I have been using Qemu / KVM to run an instance of Windows 7 and after some updates in the last 30 days  I am getting an error message: " Error starting domain: unsupported configuration: CPU mode 'custom' for x86_64 kvm domain on x86_64 host is not supported by hypervisor."

I have looked at permissions and edited the "/etc/libvirt/qemu.conf" file's group line to show KVM as the group.

Before and after the virt machine still does not lauch.

I was running okay in Dec 2017 don't use it every day or week just once in a while for updates to device frimware requiring a windows OS.

I have attached a Pastebin URL to show the output of Virtuak Machine Manager GUI error.

https://pastebin.com/148SMZV4