As a workaround, I just comment out "use-ssh-agent" in /etc/X11/Xsession.options.
As I use Xubuntu, the XFCE startup launches "ssh-agent" anyway, I am still able to use "ssh-add" with no loss of functionality.
As a workaround, I just comment out "use-ssh-agent" in /etc/X11/ Xsession. options.
As I use Xubuntu, the XFCE startup launches "ssh-agent" anyway, I am still able to use "ssh-add" with no loss of functionality.