DVI to ADC adaptor: Display power button no longer works w/G5?

I'm looking for answers on a topic originally brought up in this thread:
http://discussions.apple.com/thread.jspa?threadID=221092&tstart=45
concerning the Studio Display's power button when attached to an ADC/DVI adapter for use on a G5.
I am having the same problem. I had previously used the monitor directly attached to an MDD G4, and the power button worked fine. Now that it's attached to the adapter, I can't power up the G5. The brightness button will open the Monitors prefpane, so I would say that it's not a problem with the overall USB system.
Otherwise things work fine, so it's not the end of the world, but I'd like some confirmation or denial of the problem just to know if there's a defect or not.
TIA
G5 Mac OS X (10.4.6)

It is working normally. ADC has extra pins to support the power button and light. DVI connectors don't have these pins, so there is no way for the DVI to ADC adapter to make the power button work.

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DVI to ADC adaptor: Display power button no longer works w/G5?

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