I see this on Ubuntu 18.04 as well, but I have a gnome-based gui that works. Here's my log snippet:
May 26 12:23:47 cerberus org.gnome.ScreenSaver[2217]: Unable to init server: Could not connect: Connection refused May 26 12:23:47 cerberus gnome-screensav[2263]: Cannot open display: May 26 12:23:47 cerberus dbus-daemon[2217]: [session uid=130 pid=2217] Activated service 'org.gnome.ScreenSaver' failed: Process org.gnome.ScreenSaver exited with status 1 May 26 12:23:47 cerberus gnome-session[2223]: gnome-session-binary[2223]: CRITICAL: Unable to create a DBus proxy for GnomeScreensaver: Error calling StartServiceByName for org.gnome.ScreenSav May 26 12:23:47 cerberus gnome-session-binary[2223]: CRITICAL: Unable to create a DBus proxy for GnomeScreensaver: Error calling StartServiceByName for org.gnome.ScreenSaver: GDBus.Error:org.f -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1716639 Title: gnome-screensaver issue when using Wayland To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-screensaver/+bug/1716639/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs