This blog gives you the basic troubleshooting for oracle, Network,Firewall,Wordpress,Linux,cisco router ,Leased line,thin client,server,Windows OS,Open Office ,OpenNMS,squid etc
#/etc/gdm/custom.conf
[daemon]
AutomaticLoginEnable=true
AutomaticLogin={give your username
Then restart
Refered Link http://www.behindtherack.com/?p=416