$ cat ~/.config/autostart/x11vnc.desktop
[Desktop Entry]
Type=Application
Exec=sh -c "/usr/bin/x11vnc -auth $XAUTHORITY -rfbauth $HOME/.x11vnc/passwd -forever -shared -bg --noxfixes -noxrecord -noxdamage -rfbport 5900 -display $DISPLAY -o $HOME/.x11vnc/vnc_server.log"
Hidden=false
NoDisplay=false
X-GNOME-Autostart-enabled=true
Name[en_US]=x11vnc
Name=x11vnc
Comment[en_US]=
Comment=