Description of problem:
I ran some OS updates on Tuesday.  Since then, every evening the monitor has turned on (from powersave mode) and the screensaver is frozen.

I can still get to a virtual console by pressing the key combination C-A-F3.

I found the following lines in the logs from yesterday evening:

Mar 10 23:35:02 mycomputer.localdomain gnome-session[1566]: (gnome-shell:1584): GLib-GIO-CRITICAL **: g_dbus_connection_signal_unsubscribe: assertion 'G_IS_DBUS_CONNECTION (connection)' failed
Mar 10 23:35:02 mycomputer.localdomain gnome-session[1566]: (gnome-shell:1584): GLib-GIO-CRITICAL **: g_dbus_connection_signal_unsubscribe: assertion 'G_IS_DBUS_CONNECTION (connection)' failed
Mar 10 23:35:02 mycomputer.localdomain gnome-session[1566]: (gnome-shell:1584): GLib-GObject-CRITICAL **: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
Mar 10 23:35:02 mycomputer.localdomain gnome-session[1566]: (gnome-shell:1584): GLib-GIO-CRITICAL **: g_dbus_connection_signal_unsubscribe: assertion 'G_IS_DBUS_CONNECTION (connection)' failed
Mar 10 23:35:02 mycomputer.localdomain gnome-session[1566]: (gnome-shell:1584): GLib-GIO-CRITICAL **: g_dbus_connection_signal_unsubscribe: assertion 'G_IS_DBUS_CONNECTION (connection)' failed
Mar 10 23:35:02 mycomputer.localdomain gnome-session[1566]: (gnome-shell:1584): GLib-GObject-CRITICAL **: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
Mar 10 23:55:12 mycomputer.localdomain /usr/libexec/gdm-x-session[2208]: (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip completion event has impossible msc 219456675 < target_msc 219456676
Mar 10 23:55:53 mycomputer.localdomain gnome-session[2312]: (gnome-settings-daemon:2399): GnomeDesktop-WARNING **: Failed to acquire idle monitor proxy: Timeout was reached
Mar 10 23:55:53 mycomputer.localdomain gnome-session[2312]: (gnome-settings-daemon:2399): GnomeDesktop-WARNING **: Error setting property 'PowerSaveMode' on interface org.gnome.Mutter.DisplayConfig: Timeout was reached (g-io-error-quark, 24)
Mar 11 00:00:00 mycomputer.localdomain gnome-session[2312]: (evolution-alarm-notify:2682): evolution-alarm-notify-WARNING **: alarm.c:253: Requested removal of nonexistent alarm!


Version-Release number of selected component (if applicable):
gnome-shell-3.16.4-1.fc22.x86_64
kernel-4.4.3-201.fc22.x86_64

How reproducible:
It has happened every evening for the last three nights.

Steps to Reproduce:
1.  Press the Super-L key combination to lock the UI.
2.  Go home.
3.  Come back next morning.

Actual results:
Monitor is on and screensaver is frozen.  The time displayed is sometime in the late evening.

Expected results:
The monitor should be in powersave mode and the screensaver should respond to the keyboard and mouse.