Install gnome-session-flashback by entering the following commands in the terminal:
sudo apt update sudo apt install gnome-session-flashback
Description:
GNOME Session Manager - GNOME Flashback session
The GNOME Session Manager is in charge of starting the core components of the GNOME desktop, and applications that should be launched at login time. It also features a way to save and restore currently running applications. . This package contains the required components for the GNOME Flashback session, based on GNOME Panel 3. It can be started from a display manager such as GDM, and doesn’t have specific hardware requirements.
Homepage: https://wiki.gnome.org/Projects/GnomeFlashback
Version: 1:3.28.0-1ubuntu1
Section: universe/gnome