GUI WAY

UBUNTU (Classic Gnome / Fallback) GUI WAY

1. Go to System -> Preferences -> Startup Applications
2. Here you can click and enable/disable SOME of the services that start from a Desktop Ubuntu. Simply click on one to Enable/Disable. Note that not all services appear here, commonly only the ones that involve a system tray icon or GUI windows. Examples like the HP System Tray and the Nvidia Settings.

UBUNTU 2D/3D

1. Open the Dash and type startup app, you should see one option:

1. Open the Startup Applications App and Enable/Disable any of the services you find there. As in the Classic Gnome/Fallback way, it will only show services related to the GUI. For example: Read more …