[Bug 989452] Re: oneiric's virt-viewer can't connect to console of precise's virtual machines

[Andreas Ntaflos]

There are currently multiple bugs that deal with virt-manager/virt-
viewer not being able to connect to a VNC console of a Libvirt/KVM
domain, such as #837275, #995320 and this one.

The problem remains, however. On a Precise server (12.04.1) where
/etc/libvirt/qemu.conf has set

vnc_listen = "0.0.0.0"
vnc_tls = 0

no VNC connection is possible with neither virt-manager, nor virt-viewer
from a remote client. Virt-manager just displays the dreaded "Error:
viewer connection to hypervisor host got refused or disconnected!" and
virt-viewer says "Unable to connect to the graphic server 0:5916" when
called like this:

virt-viewer -c qemu+tcp://kvmhost04/system domain01.example.com

Libvirt is configured to allow unencrypted TCP connections (because of
bug #1001798) so regular virt-manager interaction works, just not the
VNC console.

This must be a virt-manager, Libvirt or QEMU issue, because using a VNC
viewer like xtightvncviewer to connect to the domain's VNC port works
fine:

xtightvncviewer kvmhost04:5916

So what can we do? I see no interesting log entries anywhere that would
begin to explain what is going on here.

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https://bugs.launchpad.net/bugs/989452

Title:
  oneiric's virt-viewer can't connect to console of precise's virtual
  machines

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