After removing/purging LXDE and Lubuntu-desktop, I tried restoring my Ubuntu sign-on screen by editing lightdm.conf. Unfortunately, the Ubuntu splash screen hung after selecting Ubuntu at the grub screen.
I additionally tried sudo dpkg-reconfigure lightdm before and after installing gdm but was unsuccessful. Reinstalling lightdm also didn't do anything.
Does anyone know of a different way to restore the Ubuntu sign-on screen? Thank you!
Edit: For clarification, sign-on screen means where you choose account and enter password, not the splash screen.