[CentOS] VNC

Larry Martell larry.martell at gmail.com
Sun Oct 20 03:18:40 UTC 2013


On Saturday, October 19, 2013, Earl Ramirez wrote:

> On Sat, 2013-10-19 at 17:23 -0600, Larry Martell wrote:
> > On Sat, Oct 19, 2013 at 4:56 PM, Larry Martell <larry.martell at gmail.com
> >wrote:
> >
> > > I had posted last week about trying to get VNC working. I was never
> > > successful nor were multiple admins. But we realized that all the
> hosts we
> > > tried on were VMs. We followed the same procedure (
> > > http://wiki.centos.org/HowTos/VNC-Server) on a machine with physical
> HW
> > > and it worked with no problem. But on the VM I can connect, but I
> don't get
> > > any window displayed. Here is what is in the log:
> > >
> > > Sat Oct 19 18:39:55 2013
> > >  vncext:      VNC extension running!
> > >  vncext:      Listening for VNC connections on all interface(s), port
> 5902
> > >  vncext:      created VNC server for screen 0
> > > GNOME_KEYRING_SOCKET=/tmp/keyring-Y6Tg3c/socket
> > > SSH_AUTH_SOCK=/tmp/keyring-Y6Tg3c/socket.ssh
> > > GNOME_KEYRING_PID=19728
> > > Failed to play sound: File or data not found
> > >
> > > ** (nm-applet:19775): WARNING **: <WARN>  request_name(): Could not
> > > acquire the NetworkManagerUserSettings service.
> > >   Error: (9) Connection ":1.552" is not allowed to own the service
> > > "org.freedesktop.NetworkManagerUserSettings" due to security policies
> in
> > > the configuration file
> > >
> >
> > Googling that error I found this:
> > https://bbs.archlinux.org/viewtopic.php?id=63576 and I followed the
> advice
> > there. Now I don't get that error, but I still get no display. Now all I
> > get in the log is this:
> >
> >
> > 19/10/2013 07:14:27 PM [IPv6] Got connection from client
> > ::ffff:10.250.151.75
> > 19/10/2013 07:14:27 PM   other clients:
> > 19/10/2013 07:14:27 PM Client Protocol Version 3.7
> > 19/10/2013 07:14:27 PM Advertising security type 2
> > 19/10/2013 07:14:28 PM Client returned security type 2
> >
> > My xstartup file is identical on the VM and the physical host.
> >
> > Does anyone out there have VNC working on a VM?
> >
> >
> > > 19/10/2013 06:39:59 PM Autoprobing TCP port in (all) network interface
> > > 19/10/2013 06:39:59 PM Listening IPv{4,6}://*:5900
> > > 19/10/2013 06:39:59 PM Autoprobing selected port 5900
> > > 19/10/2013 06:39:59 PM Advertising authentication type: 'VNC
> > > Authentication' (2)
> > > 19/10/2013 06:39:59 PM Advertising security type: 'VNC Authentication'
> (2)
> > >
> > > (polkit-gnome-authentication-agent-1:19796): GLib-GObject-WARNING **:
> > > cannot regster existing type `_PolkitError'
> > >
> > > (polkit-gnome-authentication-agent-1:19796): GLib-CRITICAL **:
> > > g_once_init_leave: assertion `initialization_value != 0' failed
> > > Initializing nautilus-gdu extension
> > > Initializing nautilus-open-terminal extension
> > >
> > > ** (gnome-panel:19761): CRITICAL **:
> panel_applet_frame_change_background:
> > > assertion `PANEL_IS_WIDGET (GTK_WIDGET (frame)->parent)' failed
> > >
> > > (polkit-gnome-authentication-agent-1:19796): polkit-gnome-1-WARNING
> **: No
> > > icon for themed icon with name 'preferences-system-network-proxy'
> > > Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message
> > > with a timestamp of 0 for 0x2c00003 (Authentica)
> > > Window manager warning: meta_window_activate called by a pager with a 0
> > > timestamp; the pager needs to be fixed.
> > > Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message
> > > with a timestamp of 0 for 0x2c00003 (Authentica)
> > > Window manager warning: meta_window_activate called by a pager with a 0
> > > timestamp; the pager needs to be fixed.
> > > 19/10/2013 06:40:48 PM [IPv6] Got connection from client
> > > ::ffff:10.250.151.75
> > > 19/10/2013 06:40:48 PM   other clients:
> > > 19/10/2013 06:40:49 PM Client Protocol Version 3.7
> > > 19/10/2013 06:40:49 PM Advertising security type 2
> > > 19/10/2013 06:40:49 PM Client returned security type 2
> > >
> > >
> > > Anyone have any clues as to what could be wrong and why it works on a
> > > physical host and not onI believe that I just find the answer for this
> question. I have been
> beating up myself for the last few hours and I was getting the same
> error that you posted.
>
> ****************Test Environment**************
> 2 Laptops
> 1 of the two laptop has several linux KVMs
>
> **********************************************
>
> The reason why you are not able to connect with the KVM Guest is because
> by default KVM Guest uses VNC, which will conflict with tiger-vncserver.
>
> What is your current VM environment, to resolved the issue I switch from
> VNC to spice for the choice of display for the KVM Guest and I was
> finally able to establish communication with the KVM guest.
>

What exactly did you do to effect this change?



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