I'm a relative new user in linux, I have a laptop with low-medium hardware, Unity goes OK but when I work with web browser or 3-5 windows and applications , crashes and gets slow. I have installed KDE plasma and I don't want to keep Unity anymore.
How I remove it completly??? In login screen I can see GNOME flashback (compiz) and (metacity), I want to remove them too. How I remove lightDM also??? I have gdm already installed.
I'am using UBUNTU LTS desktop 14.04
Thanks for your answers and I apologize if it's a duplicated question.
