Same happened to me few days ago and I could no longer log into Wayland (only X11). This happened after installing TLP on a Thinkpad X201:
4:28:36 AM pulseaudio: [pulseaudio] bluez5-util.c: GetManagedObjects() failed: org.freedesktop.DBus.Error.TimedOut: Failed to activate service 'org.bluez': timed out 4:28:31 AM systemd: Failed to start Postfix Mail Transport Agent (instance -). 4:28:10 AM gnome-session-b: Unrecoverable failure in required component org.gnome.Shell.desktop 4:28:10 AM gnome-shell: X Wayland crashed; aborting 4:28:09 AM gnome-session-b: CRITICAL: Unable to create a DBus proxy for GnomeScreensaver: Error calling StartServiceByName for org.gnome.ScreenSaver: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ChildExited: Process org.gnome.ScreenSaver exited with status 1 4:28:09 AM NetworkManager: ((src/devices/nm-device.c:1452)): assertion '<dropped>' failed 4:28:08 AM avahi-daemon: chroot.c: open() failed: No such file or directory Removing TLP fixed the issue though. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-session in Ubuntu. https://bugs.launchpad.net/bugs/1728383 Title: Unable to create a DBus proxy for GnomeScreensaver Status in gnome-session package in Ubuntu: Confirmed Bug description: Ubuntu 17.10, error on boot: gnome-session-b: CRITICAL: Unable to create a DBus proxy for GnomeScreensaver: Error calling StartServiceByName for org.gnome.ScreenSaver: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ChildExited: Process org.gnome.ScreenSaver exited with status 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-session/+bug/1728383/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
