Comment 19 for bug 34859

/me thinks feisty will be gnome 2.18, and gnome devs dont want to backport to 2.18 rather hacky bugfix for the hack they introduced earlier to fix buggy pam modules :) so they pushed this hacky hack for hacky hack to 2.19. or rather they deleted the hack that bugfixed pam modules, so now pam modules need fixing :) but restarting gdm works (in 2.19 that is, so not in feisty)

all we can hope is for Ubuntu gnome maintainer to backport this patch. until then its alt-ctrl-f1 and sudo /etc/init.d/gdm start for us :/