I am trying to deploy a bunch of machines without any KB/mouse, only a display. Their job is to launch Firefox and immediately display a URL full screen. Everything is working except that the screens go blank ten minutes after boot unless the mouse is moved at least one time. Once you move the mouse, the display will stay on forever (tested to five days).
I have disabled all lock/sleep options in the UI. Additionally, I've spent hours trying different solutions from this and other forums and various other Linux admins I work with, and found no success. I'll outline what's been tried so far below (and I'm sure I'll miss other things that have also been tried, there have been a lot of things attempted).
I even attempted to use xdotool to move the mouse right after the desktop loads, but that does NOT prevent sleep. It only prevents sleep if I move a real mouse or move it over VNC.
Tried:
xset s noblank xset -dpms ; xset s off setterm -powersave off -blank 0 setterm -blank 0 -powersave off -powerdown 0 xset s off