“We decided to switch to GNDM Display Manager (GDM) instead of LightDM,” said Canonical. “We plan to use LightDM, and according to our survey, we need to invest a lot of time to make everything work, but We have not used that much time. ”
Canonical decided to discontinue the development of its internal use of the Unity user interface and replace it with the Ubuntu 17.10 (Artful Aardvark) operating system using the more popular GNOME desktop environment. Now, Ubuntu 17.10 latest daily Build ISO image by default or using LightDM login manager, but is expected in June 29, 2019 launched the first Alpha milestone version began to use GDM.