Select Your Language

Infrastructure and Management

Cloud Computing

Storage

Runtimes

Integration and Automation

  • Comments
  • RHEL7: XDMCP error with Xming

    Posted on

    I have RHEL7 and try to connect to my server via XDMCP with Xming 6.9.0.31. It fails and I can see the following errors in /var/log/messages:

    Sep 18 07:32:27 gdvmei dbus-daemon: dbus[813]: [system] Rejected send message, 1 matched rules; type="method_call", sender=":1.20" (uid=0 pid=1551 comm="/usr/sbin/gdm ") interface="org.freedesktop.DBus.Properties" member="GetAll" error name="(unset)" requested_reply="0" destination=":1.37041" (uid=0 pid=11241 comm="/usr/libexec/gdm-xdmcp-chooser-slave --display-id ")
    Sep 18 07:32:27 gdvmei dbus[813]: [system] Rejected send message, 1 matched rules; type="method_call", sender=":1.20" (uid=0 pid=1551 comm="/usr/sbin/gdm ") interface="org.freedesktop.DBus.Properties" member="GetAll" error name="(unset)" requested_reply="0" destination=":1.37041" (uid=0 pid=11241 comm="/usr/libexec/gdm-xdmcp-chooser-slave --display-id ")
    Sep 18 07:32:27 gdvmei dbus-daemon: dbus[813]: [system] Rejected send message, 1 matched rules; type="method_call", sender=":1.20" (uid=0 pid=1551 comm="/usr/sbin/gdm ") interface="org.freedesktop.DBus.Properties" member="GetAll" error name="(unset)" requested_reply="0" destination=":1.37041" (uid=0 pid=11241 comm="/usr/libexec/gdm-xdmcp-chooser-slave --display-id ")
    Sep 18 07:32:27 gdvmei dbus[813]: [system] Rejected send message, 1 matched rules; type="method_call", sender=":1.20" (uid=0 pid=1551 comm="/usr/sbin/gdm ") interface="org.freedesktop.DBus.Properties" member="GetAll" error name="(unset)" requested_reply="0" destination=":1.37041" (uid=0 pid=11241 comm="/usr/libexec/gdm-xdmcp-chooser-slave --display-id ")
    Sep 18 07:32:27 gdvmei gdm: GdmLaunchEnvironment: Failed to create directory (null): Bad address
    Sep 18 07:32:27 gdvmei gdm: GLib-GObject: invalid (NULL) pointer instance
    Sep 18 07:32:27 gdvmei gdm: GLib-GObject: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
    Sep 18 07:32:27 gdvmei gdm: GLib-GObject: invalid (NULL) pointer instance
    Sep 18 07:32:27 gdvmei gdm: GLib-GObject: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
    Sep 18 07:32:27 gdvmei gdm: GLib-GObject: invalid (NULL) pointer instance
    Sep 18 07:32:27 gdvmei gdm: GLib-GObject: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
    Sep 18 07:32:27 gdvmei gdm: GLib-GObject: invalid (NULL) pointer instance
    Sep 18 07:32:27 gdvmei gdm: GLib-GObject: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
    

    I have the following config in /etc/gdm/custom.conf:

    [daemon]
    
    [security]
    DisallowTCP=false
    AllowRemoteRoot=true
    
    [xdmcp]
    Enable=true
    
    [greeter]
    
    [chooser]
    
    [debug]
    Enabled=true
    

    Any idea what the problem is?
    Thanks.

    Cédric

    by

    points

    Responses

    Red Hat LinkedIn YouTube Facebook X, formerly Twitter

    Quick Links

    Help

    Site Info

    Related Sites

    © 2026 Red Hat