I'd like to put the built-in display into standby (E.G.
xset dpms force off) and keep the display off even if the mouse moves. That is, I want to ignore mouse movement for the purposes of waking the display. How can I achieve this?
The use case is: I'm using Synergy to control other machines, and the built in display on the host generates a lot of heat. if I'm not actively using it, I'd like the display to sleep while focused on another machine.
The accepted answer in Can I force screen blank and ignore input? doesn't work for me because I want X11 to be able to receive mouse input, I just don't want that mouse input to wake the screen (I.E. that suggestion causes Synergy to lose access to the mouse input)