I’ve seen the same issue when connecting my ACD to my MBP through a displayport to DVI adapter. I’m not sure what the problem is, but if I had to guess I would say the problem lies in not having all the pins wired up correctly and therefore making the displayport adapter not switch into DVI compatibility mode. I wonder if the one of the printed circuit boards people have made works or maybe the official adapter.
I haven’t done anything with this design in quite a while, but I can say the board I built a couple years ago is still working. That funky problem with the grounding doesn’t seem to have resolved the issue I was having with the monitor shutting off, and it seems to do with hot weather (no problems all winter in <70°F indoor temperatures; problems start in summer … hmm …)]]>
So, I got the mini-port to DVI cable to connect my Modified Cinema display. Unfortunately, I cannot get the any good result, and get just black screen.
So, If you have any enhanced idea to connect Thunderbolt to ‘Our’ modified Cinema display, Please tell me the additional wiring.
Best Regards, June toda.]]>
The USB connection on the ADC adapter serves two purposes:
1. Controlling the monitor from the desktop. There are no physical buttons on the display for adjusting the brightness or turning it on/off. Those buttons are just controls that go back to the computer, which then sends commands back to the display to act accordingly. I learned that on my PowerMac G4, the power button on the monitor replicates the power button on the tower. If the system is completely shut down then I can press the power button on the monitor to start it up.
2. Provides USB pass-through for the hub built into the back of the monitor. The acrylic Cinema Displays have USB 1.1 hubs and the aluminum models have USB 2.0.