Comment 46 for bug 531027

folks,
I have the same problem fixed on my tablet-pc.
Symptoms was : error **GLIB WARNING ** GLib - getpwuid_r(): failed due to unknown user id (0)** while booting and PC was stopped to boot into GUI, while network was up and fully functional.
I have found another bug in X-logs "VT_WAITACTIVE"
Fixed with adding sleep into bottom of /etc/init/gdm.conf
-------
sleep 5
    exec gdm-binary $CONFIG_FILE
end script
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By the way, error with Glib is still unrecovered and appeared at start as well as at shutdown.