Waking Screen After User Inactivity

In Ubuntu 22.04 with Gnome, how can I 'wake up' the screen programmatically once it is has blanked due to user inactivity? I tried the following:

gdbus call --session --dest org.gnome.ScreenSaver --object-path /org/gnome/ScreenSaver --method org.gnome.ScreenSaver.SimulateUserActivity

But received an error indicating that SimulateUserActivity is an unknown method (verified using '***gdbus introspect***') I then tried:

dbus-send --system --type=signal /org/gnome/ScreenSaver org.gnome.ScreenSaver.WakeUpScreen

Unsurprisingly, that also did not work (no error, but screen stayed blank) Finally, I tried using ***xdotool*** to simulate keypresses and mouse moves. Screen still stayed blank.