Changing Unity 3D to Unity 2D

Changing default behavior to unity 2D when login needs to follow the steps below

1. Install the deb package sudo apt-get install unity-2d
2. rm /usr/share/xsessions/ubuntu.desktop (You can rename it if you want unity 3d)
3. /bin/sed -i "/Session*/c Session=gnome-fallback-compiz" /var/cache/lightdm/dmrc/*.dmrc (Change the default session to gnome-fallback-compiz)
4. Restart your machine and the default UI of Ubuntu will become Unity 2D

References

1. http://askubuntu.com/questions/62833/how-do-i-change-the-default-session-for-when-using-auto-logins
2. https://wiki.ubuntu.com/LightDM
3. https://ubuntuforums.org/showthread.php?t=2245261
4. http://askubuntu.com/questions/456766/how-to-set-default-session-in-ubuntu-14-04-lts

Environment

• Ubuntu 14.04