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Adding my voice to this. It's understood that this is a remote support tool and thus the flexibility to remotely support nearly anything is a must. 

That said, we have only seen this be a problem with discrete GPU's with Displayport right now. Most of the machines we support are onboard DP and do not have this problem. 

Can't we just send a trigger to the OS / GPU to activate output?  There must be a better solution than RDP or dummy plugs.....