GUI screen does not come up after login

Solution Verified - Updated -

Environment

  • Red Hat Enterprise Linux 6
  • dbus

Issue

  • After rpoviding login credentials from GUI login screen, GUI screen fails to come up with following error message:

Failed to start message bus: Failed to open "/etc/dbus-1/session.conf":  No such file or directory.

Resolution

  • Reinstall the dbus package using below command:

# yum reinstall dbus

  • Now restart the message bus as below:

# service messagebus restart

Root Cause

  • dbus configuration file /etc/dbus-1/session.conf was missing on the system along with few other files which are provided with the dbus package.

Diagnostic Steps

  • Check the output of "rpm -Va" command provided in "rpm-Va" file with sosreport. Following entries wrt to the issue are relevant, which are found in the file:

missing     /etc/dbus-1/system.d/printdriverselector.conf
missing   c /etc/dbus-1/system.d/yum-updatesd.conf
missing     /etc/dbus-1
missing   c /etc/dbus-1/session.conf
missing     /etc/dbus-1/session.d
missing   c /etc/dbus-1/system.conf
missing     /etc/dbus-1/system.d
missing     /etc/dbus-1/system.d/cups.conf
missing     /etc/dbus-1/system.d/NetworkManager.conf
missing     /etc/dbus-1/system.d/nm-avahi-autoipd.conf
missing     /etc/dbus-1/system.d/nm-dhcp-client.conf
missing     /etc/dbus-1/system.d/nm-dispatcher.conf
missing     /etc/dbus-1/system.d/nm-system-settings.conf
missing   c /etc/dbus-1/system.d/bluez-hcid.conf
missing     /etc/dbus-1/system.d
missing     /etc/dbus-1/system.d/hal.conf
missing     /etc/dbus-1/system.d/NetworkManager.conf
missing     /etc/dbus-1/system.d/nm-avahi-autoipd.conf
missing     /etc/dbus-1/system.d/nm-dhcp-client.conf
missing     /etc/dbus-1/system.d/nm-dispatcher.conf
missing     /etc/dbus-1/system.d/nm-system-settings.conf
missing     /etc/dbus-1/system.d/nm-applet.conf
missing     /etc/dbus-1/system.d/wpa_supplicant.conf
missing   c /etc/dbus-1/system.d/setroubleshootd.conf
missing     /etc/dbus-1/system.d/gnome-power-manager.conf
missing   c /etc/dbus-1/system.d/avahi-dbus.conf

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