I've installed Gnome Flashback and can select it on the log in screen: enter image description here

Unfortunately, every time I restart I'm automatically logged into the original "Ubuntu" (Gnome 3) environment again. The solutions in these related questions don't work anymore:

how to set default session in Ubuntu 14.04 LTS?

How do I change the default session for when using auto-logins?

Specifically, setting user-session to gnome-flashback-metacity in /usr/share/lightdm/lightdm.conf.d/50-ubuntu.conf has no effect.

How do I fix this?

  • 2
    Sounds like a bug because I have five DE's in 18.04 to pick from and whichever one I pick sticks as the default for the next login. – WinEunuuchs2Unix Jun 24 '18 at 17:20

Found a workaround. Install LightDM (which IMHO looks much better than the default GDM):

sudo apt-get install lightdm

Then disable and re-enable autologin (if needed). This creates a working configuration that remembers your selected desktop environment.


You could reconfigure your default display manager using these steps in the terminal. I am assuming that your default is gdm3 and you want to move to lightdm

$ sudo dpkg-reconfigure gdm3
  • I’ve tried this but dpkg-reconfigure doesn’t offer any choices and immediately ends with exit code 0. – Daniel Böhmer Jun 13 '19 at 19:21

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