I removed Unity from my computer. But still lightdm is showing when I typed
sudo dpkg-reconfigure lightdm. I want to remove it. What can I do?
If you do a
sudo apt-get remove lightdm
instead leaving out the purge, if anything does go wrong and you cannot log into a graphical session you can always drop to a terminal and restore LightDM.
After the remove if everything works properly you can then purge the config files ..
If you will do -
sudo apt-get purge lightdm
sudo aptitude purge lightdm
then you cant restore it back without installing.