In my Ubuntu 14.04 /etc/lightdm/unity-greeter.conf and /etc/lightdm/lightdm.conf files are missing. Only /etc/lightdm/users.conf file is there in /etc/lightdm/ directory.
And login screen is not smooth either. Sometimes when typing the password, it does not appearing. How can I fix this?
Those files no longer exist and are depreciated. Configuration is now done through individual files located in /etc/lightdm/lightdm.conf.d.
If you want do some configuration, maybe see this answer as an example.
Alternatively, see this answer on how to set default manager now that lightdm.conf does not exist.
