[gdm-list] gdm and tigervnc problem on Fedora 19

["Bob B." <bb1 halebob net>]

Hello,

I used to be able to start a remote gdm login session through VNC by 
issuing the following command:

Xvnc :21 -query localhost -once -geometry 1280x1024 -depth 24 
-DisconnectClients=0 -NeverShared -SecurityTypes=none

This command no longer works with Fedora 19.  The command returns 
immediately and there is no VNC listener on port 5921.  Any ideas why?  
I have xdmcp enabled.

Here is what shows up in /var/log/messages after running the above command:
...
Dec  2 13:09:31 sherpa dbus-daemon[526]: dbus[526]: [system] Rejected 
send message, 1 matched rules; type="method_call", sender=":1.14" (uid=0 
pid=795 comm="/usr/sbin/gdm ") 
interface="org.freedesktop.DBus.Properties" member="GetAll" error 
name="(unset)" requested_reply="0" destination=":1.498" (uid=0 pid=29220 
comm="/usr/libexec/gdm-simple-slave --display-id /org/gn")
Dec  2 13:09:31 sherpa dbus[526]: [system] Rejected send message, 1 
matched rules; type="method_call", sender=":1.14" (uid=0 pid=795 
comm="/usr/sbin/gdm ") interface="org.freedesktop.DBus.Properties" 
member="GetAll" error name="(unset)" requested_reply="0" 
destination=":1.498" (uid=0 pid=29220 
comm="/usr/libexec/gdm-simple-slave --display-id /org/gn")
Dec  2 13:09:32 sherpa gdm[795]: non-network local connections being 
added to access control list
Dec  2 13:09:32 sherpa systemd-logind[515]: New session c4 of user 
gnome-initial-setup.
Dec  2 13:09:32 sherpa /usr/bin/dbus-launch[828]: gnome-session[828]: 
DEBUG(+): GsmSystemd: received logind signal: SessionNew
Dec  2 13:09:32 sherpa /usr/bin/dbus-launch[828]: gnome-session[828]: 
DEBUG(+): GsmSystemd: ignoring SessionNew signal
Dec  2 13:09:32 sherpa gnome-session[828]: DEBUG(+): GsmSystemd: 
received logind signal: SessionNew
Dec  2 13:09:32 sherpa gnome-session[828]: DEBUG(+): GsmSystemd: 
ignoring SessionNew signal
Dec  2 13:09:32 sherpa /usr/bin/dbus-launch[29237]: No protocol specified
Dec  2 13:09:32 sherpa /usr/bin/dbus-launch[29237]: ** 
(gnome-session-check-accelerated:29244): WARNING **: Could not open X 
display
Dec  2 13:09:32 sherpa /usr/bin/dbus-launch[29237]: No protocol specified
Dec  2 13:09:32 sherpa /usr/bin/dbus-launch[29237]: 
(gnome-session-check-accelerated:29244): Gtk-WARNING **: cannot open 
display: 127.0.0.1:21
Dec  2 13:09:32 sherpa /usr/bin/dbus-launch[29237]: No protocol specified
Dec  2 13:09:32 sherpa /usr/bin/dbus-launch[29237]: ** 
(gnome-session-check-accelerated:29257): WARNING **: Could not open X 
display
Dec  2 13:09:32 sherpa /usr/bin/dbus-launch[29237]: No protocol specified
Dec  2 13:09:32 sherpa /usr/bin/dbus-launch[29237]: 
(gnome-session-check-accelerated:29257): Gtk-WARNING **: cannot open 
display: 127.0.0.1:21
Dec  2 13:09:32 sherpa /usr/bin/dbus-launch[29237]: ** (process:29237): 
WARNING **: software acceleration check failed: Child process exited 
with code 1
Dec  2 13:09:32 sherpa /usr/bin/dbus-launch[29237]: No protocol specified
Dec  2 13:09:32 sherpa /usr/bin/dbus-launch[29237]: ** 
(gnome-session:29237): WARNING **: Could not open X display
Dec  2 13:09:32 sherpa /usr/bin/dbus-launch[29237]: No protocol specified
Dec  2 13:09:32 sherpa /usr/bin/dbus-launch[29237]: ** 
(gnome-session:29237): WARNING **: Cannot open display:
Dec  2 13:09:32 sherpa gdm[795]: Child process -29237 was already dead.
Dec  2 13:09:32 sherpa gdm[795]: GLib-GObject: g_object_ref: assertion 
`object->ref_count > 0' failed
Dec  2 13:09:32 sherpa gdm[795]: GLib-GObject: g_object_unref: assertion 
`object->ref_count > 0' failed
Dec  2 13:09:32 sherpa gdm[795]: GdmDisplay: display lasted 0.777427 seconds

Thanks for help anyone can provide.

Regards,
Bob