Black screen and keyboard not working after login from suspend

Log file as follows :-

Jan 13 21:50:10 Inspiron5559c7cb1844 gala[1859]: clutter_actor_add_effect_with_name: assertion 'CLUTTER_IS_ACTOR (self)' failed
Jan 13 21:50:10 Inspiron5559c7cb1844 gala[1859]: invalid (NULL) pointer instance
Jan 13 21:50:10 Inspiron5559c7cb1844 gala[1859]: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
Jan 13 21:50:33 Inspiron5559c7cb1844 gala[1859]: meta_window_is_focusable: assertion '!window->unmanaging' failed
Jan 13 21:50:59 Inspiron5559c7cb1844 gala[1859]: ScreenShield.vala:421: Unable to set locked hint on login session: GDBus.Error:org.freedesktop.DBus.Error.UnknownObject: Unknown object '/org/freedesktop/login1/session/c1'.
Jan 14 06:53:44 Inspiron5559c7cb1844 gala[1859]: meta_window_is_focusable: assertion '!window->unmanaging' failed
Jan 14 06:53:44 Inspiron5559c7cb1844 gala[1859]: ScreenShield.vala:421: Unable to set locked hint on login session: GDBus.Error:org.freedesktop.DBus.Error.UnknownObject: Unknown object '/org/freedesktop/login1/session/c1'.
Jan 14 07:10:49 Inspiron5559c7cb1844 gala[1859]: invalid (NULL) pointer instance
Jan 14 07:10:49 Inspiron5559c7cb1844 gala[1859]: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
Jan 14 07:10:49 Inspiron5559c7cb1844 gala.desktop[1859]: Window manager warning: Invalid WM_TRANSIENT_FOR window 0x0 specified for 0x4200045.
Jan 14 07:10:50 Inspiron5559c7cb1844 gala[1859]: invalid (NULL) pointer instance
Jan 14 07:10:50 Inspiron5559c7cb1844 gala[1859]: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
Jan 14 07:10:50 Inspiron5559c7cb1844 gala.desktop[1859]: Window manager warning: Invalid WM_TRANSIENT_FOR window 0x0 specified for 0x4200045.
Jan 14 07:42:56 Inspiron5559c7cb1844 gala[1859]: invalid (NULL) pointer instance
Jan 14 07:42:56 Inspiron5559c7cb1844 gala[1859]: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
Jan 14 07:42:56 Inspiron5559c7cb1844 gala.desktop[1859]: Window manager warning: Invalid WM_TRANSIENT_FOR window 0x0 specified for 0x4200045.
Jan 14 07:48:03 Inspiron5559c7cb1844 gala[1859]: invalid (NULL) pointer instance
Jan 14 07:48:03 Inspiron5559c7cb1844 gala[1859]: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
Jan 14 07:48:03 Inspiron5559c7cb1844 gala.desktop[1859]: Window manager warning: Invalid WM_TRANSIENT_FOR window 0x0 specified for 0x4200045.
Jan 14 10:29:32 Inspiron5559c7cb1844 gala.desktop[1859]: Window manager warning: Invalid WM_TRANSIENT_FOR window 0x0 specified for 0x4200045.
Jan 14 10:37:58 Inspiron5559c7cb1844 gala[1859]: invalid (NULL) pointer instance
Jan 14 10:37:58 Inspiron5559c7cb1844 gala[1859]: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
Jan 14 10:40:28 Inspiron5559c7cb1844 gala[1859]: invalid (NULL) pointer instance
Jan 14 10:40:28 Inspiron5559c7cb1844 gala[1859]: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
Jan 14 11:00:33 Inspiron5559c7cb1844 gala[1859]: invalid (NULL) pointer instance
Jan 14 11:00:33 Inspiron5559c7cb1844 gala[1859]: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
Jan 14 11:00:34 Inspiron5559c7cb1844 gala[1859]: invalid (NULL) pointer instance
Jan 14 11:00:34 Inspiron5559c7cb1844 gala[1859]: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
Jan 14 11:11:54 Inspiron5559c7cb1844 gala.desktop[1859]: Window manager warning: WM_TRANSIENT_FOR window 0x680dcbe for 0x680def6 window override-redirect is an override-redirect window and this is not correct according to the standard, so we'll fallback to the first non-override-redirect window 0x6800008.
Jan 14 11:11:59 Inspiron5559c7cb1844 gala.desktop[1859]: Window manager warning: WM_TRANSIENT_FOR window 0x680e790 for 0x680ec12 window override-redirect is an override-redirect window and this is not correct according to the standard, so we'll fallback to the first non-override-redirect window 0x6800008.
Jan 14 11:12:07 Inspiron5559c7cb1844 gala[1859]: invalid (NULL) pointer instance
Jan 14 11:12:07 Inspiron5559c7cb1844 gala[1859]: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
Jan 14 11:13:46 Inspiron5559c7cb1844 gala[1859]: invalid (NULL) pointer instance
Jan 14 11:13:46 Inspiron5559c7cb1844 gala[1859]: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
Jan 14 11:14:22 Inspiron5559c7cb1844 gala[1859]: invalid (NULL) pointer instance
Jan 14 11:14:22 Inspiron5559c7cb1844 gala[1859]: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
Jan 14 11:55:26 Inspiron5559c7cb1844 gala[1859]: clutter_actor_add_effect_with_name: assertion 'CLUTTER_IS_ACTOR (self)' failed
Jan 14 11:55:26 Inspiron5559c7cb1844 gala[1859]: invalid (NULL) pointer instance
Jan 14 11:55:26 Inspiron5559c7cb1844 gala[1859]: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed