(The specs seem to say that the power is connected at the port but cables should not pass it through in DP 1.2 like they would in DP 1.1.)USB seems a viable alternative for power but HPD uses a 3.3V supply while USB is 5V. I can't find any easy-to-open DP to DP adapters but maybe I can hack a cable.Further research indicates that in DP 1.1 there is a power line but it's not available in DP 1.2. I think something similar would work for DP.
I don't have access to the official DP specs (or the official USB specs for that matter) and I'd rather not fry my video cards or monitor.I'm hoping there's someone familiar with DisplayPort here that can either tell me if this is likely to work or can point me in the right direction.(Using other video connection types is not an option. Maybe a zener diode based regulator would do the trick, sort of like this:Spice simulations seem to indicate the voltage would fall within what is necessary to pull up the HPD.So far this is all theoretical.
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