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I have done this with triple head Linux (it works!!), which is not my current case, but just to explain.

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I have this scenario, which i need to solve with Linux.

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How can i take 2PC output and display it to 1 screen on-demand like source switching depending on request. So whenever i change source it shows PC1 output only and when i switch back it will show PC2 output only?

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It seems that DDC (Display Data Channel) could be the answer Try this DDCControl

from the config file (options.xml)

-<control name="Input Source Select" address="0x60" type="list" id="inputsource">
 <value name="Analog" id="analog"/> 
 <value name="Digital" id="digital"/> 
</control> 
-<control name="Autoselect Input Source" address="0xe2" type="list" id="autosource">        
<value name="Automatic" id="auto" value="0"/> 
<value name="Manual" id="manual" value="1"/>
</control>
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DDCControl, can tell my display screen to change now to DVI or VGA? – YumYumYum Jan 23 at 18:29
The DDC standard is older than that. What's the point with being old and unmaintained? It's just a small tool, not a nuclear reactor control system. – DrNoone Jan 23 at 18:29
WITH ALL RESPECT :) Just that its old does not mean bad, old is gold and genius and robust. What was making me confuse is that, can DDC send the signal to the monitor "Please change the source now from VGA to DVI and vice versa, ofcource if the monitor is compatible with VESA/DDC" – YumYumYum Jan 23 at 18:33
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I don't know if it will work "out of the box" but from the config file I can tell that the commands exists. See edit in answer – DrNoone Jan 24 at 17:48
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