尝试在 Gnome 设置中启用常规共享，然后启用和配置文件共享、屏幕共享等。当我通过右上角的主切换按钮启用共享时，没有任何变化（我只看到共享设置的计算机名称部分），当我切换出共享设置并返回时，切换按钮再次关闭。也有类似的问题，关于屏幕共享切换按钮无法保持打开状态，但我甚至无法做到这一点。切换开/关滑块后，Syslog 显示以下内容：
Apr 6 22:25:54 ubu-desk dbus-daemon[1253]: [system] Activating service name='com.ubuntu.WhoopsiePreferences' requested by ':1.206' (uid=1000 pid=5289 comm="gnome-control-center " label="unconfined") (using servicehelper)
Apr 6 22:25:54 ubu-desk dbus-daemon[1253]: [system] Successfully activated service 'com.ubuntu.WhoopsiePreferences'
Apr 6 22:25:54 ubu-desk com.ubuntu.WhoopsiePreferences[1253]: Acquired the name: com.ubuntu.WhoopsiePreferences
Apr 6 22:25:54 ubu-desk dbus-daemon[1253]: [system] Activating via systemd: service name='org.freedesktop.GeoClue2' unit='geoclue.service' requested by ':1.206' (uid=1000 pid=5289 comm="gnome-control-center " label="unconfined")
Apr 6 22:25:54 ubu-desk systemd[1]: Starting Location Lookup Service...
Apr 6 22:25:54 ubu-desk gnome-control-c[5289]: Failed fetch permissions from flatpak permission store: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.impl.portal.PermissionStore was not provided by any .service files
Apr 6 22:25:54 ubu-desk dbus-daemon[1253]: [system] Successfully activated service 'org.freedesktop.GeoClue2'
Apr 6 22:25:54 ubu-desk systemd[1]: Started Location Lookup Service.
Apr 6 22:25:55 ubu-desk dbus-daemon[1253]: [system] Activating via systemd: service name='org.freedesktop.hostname1' unit='dbus-org.freedesktop.hostname1.service' requested by ':1.206' (uid=1000 pid=5289 comm="gnome-control-center " label="unconfined")
Apr 6 22:25:55 ubu-desk systemd[1]: Starting Hostname Service...
Apr 6 22:25:55 ubu-desk dbus-daemon[1253]: [system] Successfully activated service 'org.freedesktop.hostname1'
Apr 6 22:25:55 ubu-desk systemd[1]: Started Hostname Service.
Apr 6 22:25:55 ubu-desk gnome-control-c[5289]: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
还有其他日志对此有帮助吗？寻求一些指导，谢谢
Ubuntu 18.04.2
4.18.0-17-通用
GNOME 3.28.2