Created attachment 171908 [details]
gnome-screensaver --no-daemon --debug output

I use the following script to lock my console and suspend my screens:

gnome-screensaver-command --lock
sleep 7s
xset dpms force standby

First, everything works as expected. I see the screensaver appearing on the screens and after 7s the screens go into standby mode. But after a few more seconds, the screens wake-up from standby for some unknown reason. I suspect gnome-screensaver as a potential culprit.

Here is a snipped from gnome-screensaver debug:

[gs_manager_set_lock_active] gs-manager.c:419 (18:33:48):	 Setting lock active: 1
[gs_window_raise] gs-window-x11.c:749 (18:33:55):	 Raising screensaver window
[window_obscured_cb] gs-manager.c:1374 (18:33:55):	 Handling window obscured: obscured
[gs_job_stop] gs-job.c:483 (18:33:55):	 stopping job
[gs_job_died] gs-job.c:128 (18:33:55):	 Waiting on process 12028
[gs_job_died] gs-job.c:142 (18:33:55):	 Job died
[window_obscured_cb] gs-manager.c:1374 (18:33:55):	 Handling window obscured: obscured
[gs_job_stop] gs-job.c:483 (18:33:55):	 stopping job
[gs_job_died] gs-job.c:128 (18:33:55):	 Waiting on process 12030
[gs_job_died] gs-job.c:142 (18:33:55):	 Job died
[gs_window_xevent] gs-window-x11.c:813 (18:33:55):	 not raising our windows
[listener_add_ref_entry] gs-listener-dbus.c:716 (18:33:58):	 adding throttler from Power screensaver for reason 'Display DPMS activated' on connection :1.24