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As it says in title:

How to force xorg to use specific display trough HDMI, regardless if it is plugged in?

I have TV that has some crazy "power save" option that can't be turned off and X thinks that HDMI is unplugged. After that, everything goes mad and sometimes my program bricks.

If I could tell X to act as there is always that TV plugged in into HDMI that would solve problem.

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See if this post helps you at all or if it can give you some ideas about the things involved with configuring your display. Also, look at the different options that 'xrandr' and 'EDID' allow.

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