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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.

Output of ps ax | grep libvirt:

9225 ? Sl 0:04 /usr/sbin/libvirtd -d
9302 ? S 0:00 /usr/sbin/dnsmasq -u libvirt-dnsmasq --strict-order --bind-interfaces --pid-file=/var/run/libvirt/network/ --conf-file= --except-interface lo --listen-address --dhcp-range, --dhcp-leasefile=/var/lib/libvirt/dnsmasq/default.leases --dhcp-lease-max=253 --dhcp-no-override`

Output of ls -l /var/run/libvirt/libvirt-sock:

srwxrwx--- 1 root libvirtd 0 Set 13 15:04 /var/run/libvirt/libvirt-sock

Output of getent group libvirtd:


Detailed error message

Impossível conectar a libvirt:

Falha ao conectar socket a '/var/run/libvirt/libvirt-sock': Permissão negada

Verify that:
 - The 'libvirt-bin' package is installed
 - The 'libvirtd' daemon has been started
 - You are member of the 'libvirtd' group

A URI Libvirt é: qemu:///system

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/", line 1185, in _open_thread
    self.vmm = self._try_open()
  File "/usr/share/virt-manager/virtManager/", line 1167, in _try_open
  File "/usr/lib/python2.7/dist-packages/", line 102, in openAuth
    if ret is None:raise libvirtError('virConnectOpenAuth() failed')
libvirtError: Falha ao conectar socket a '/var/run/libvirt/libvirt-sock': Permissão negada
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The error doesn't show up if I start gksudo virt-manager –  That Brazilian Guy Sep 13 '13 at 18:52
What are the contents of your /etc/libvirt/libvirtd.conf file? –  Bruno Pereira Sep 13 '13 at 19:41

2 Answers 2

up vote 10 down vote accepted

Sometimes stupidity is the cause.

Rebooting the host OS solved the issue.

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I'm managing both Qemu and Virtualbox on my Ubuntu 14.02 machine, and after installing Virtualbox libvirt-bin failed to autostart. So check if libvirt-bin is running:

ps faux | grep libvirt-bin

if you don't see it in ps output - start in manually, then run virt-manager:

sudo service libvirt-bin start

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