KVM Virt-Manager Error: No active connection to Installed on

Question

When I tried to install new virtual machine in virt-manager, virtualization - localhost (QEMU) is not connected.

It shows Error: No active connection to installed on. How to fix this problem.

Answer 1

You are likely going to need to make sure your user owns the libvirt socket

sudo chown $USER:$USER /var/run/libvirt/libvirt-sock

Answer 2

1. Verify you have all packages you need

   sudo apt install -y qemu-kvm libvirt0 libvirt-bin virt-manager bridge-utils
   sudo systemctl enable libvirt-bin
   

2. Verify that libvirtd and libvirt-bin are up and running

   sudo service libvirtd status
   sudo service libvirt-bin status
   

3.  sudo systemctl reboot
   

Answer 3

Make sure your username is part of the libvirt group. Try running sudo adduser <username> libvirt. This fixed the problem for me.

Answer 4

In my case I had the error when trying to run it right after the installation.

I tried restarting the libvirtd service in that same session but with no success.

I tried logging out and logging back in still with no success.

But after rebooting the machine, all was fine.

Answer 5

Try restarting the libvirtd service:

sudo service libvirtd stop
sudo service libvirtd start