How to enable autologin in Ubuntu Jaunty with GDM

To enable automatic login in Ubuntu Jaunty running GDM (default) without clicking, add something like this to the [daemon] section of /etc/gdm/gdm.conf-custom:

TimedLoginEnable=true
TimedLoginDelay=10
TimedLogin=myusername

Once done, restart gdm (this will force an immediate logout):

$ sudo /etc/init.d/gdm restart