Synaptic Package Manager doesn't launch from the Application Menu

You can fix it by following:

  1. Open terminal (ctrl+alt+T) and execute:

    gksudo gedit /usr/share/applications/synaptic.desktop
    

    If gksudo is not installed, you can just install it. It's provided by the gksu Install gksu package.

    (Or you can run sudo -H gedit instead. But avoid sudo gedit).

  2. Change line Exec=synaptic-pkexec to Exec=gksudo synaptic.

  3. Save file and close text editor.