I have an Ubuntu server running xdm with openbox on which is plugged a monitor that displays a video which is launched via a cron daemon.When the monitor is not used for a certain amount of time, it goes into sleep mode and I cannot wake it up with the video process : The monitor stays black.How can I wake the monitor? Without installing packages if possible, and without a physical access to the machine.
Wake monitor from sleep remotely
openbox;sleep
xset --helpusage:  xset [-display host:dpy] option ...    To control Energy Star (DPMS) features:    -dpms      Energy Star features off    +dpms      Energy Star features on     dpms [standby [suspend [off]]]          force standby          force suspend          force off          force on          (also implicitly enables DPMS features)          a timeout value of zero disables the modeSo if you get the ${DISPLAY} of the monitor you can:xset -display ${DISPLAY} dpms force on