How to get monitor state?

I want to turn off the screen after 10 minutes of inactivity, and 1 minute later, **IF** the monitor is still off, then lock the screen. I know how to turn the screen off with dbus, how to lock screen, and how to get the screensaver state (i.e., if the screen is locked). But I do not know how to get the current monitor state ON/OFF. So I want for KDE to trigger this script after 10 minutes of inactivity: #!/bin/bash sleep 1 dbus-send --session --print-reply --dest=org.kde.kglobalaccel /component/org_kde_powerdevil org.kde.kglobalaccel.Component.invokeShortcut string:'Turn Off Screen' sleep 60 [[ ]] && dbus-send --session --print-reply --dest=org.freedesktop.ScreenSaver /ScreenSaver org.freedesktop.ScreenSaver.Lock So how to query for monitor state (preferably with dbus), namely, the `` condition in the above script? I used to do xset -q | grep -i 'monitor is off', but now I get an error: Server does not have the DPMS Extension.