> But I cannot login to the GNOME 3 Desktop on the client. I used the
> netinstall ISO image of Ubuntu. During installation, I have chose
> "Ubuntu GNOME Desktop" as the only desktop.
> So my display manager is gdm3.
It sounds as if GDM has its own PAM module that isn't configured to use SSSD.
Check out /etc/pam.d/gdm or similar and see if it includes the "common-*"
modules (and verify that they include the SSSD libraries in their stacks). You
can compare it to the SSH module.
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