Currently Being ModeratedFeb 5, 2013 11:55 AM (in response to BrandonScrushy)
The Mac depends on getting ID and capabilities information from the display, and sometimes HDMI devices do not provide it readily. "Detect Displays" button may force the device to send ID and capabilities again.
It is also often the case that HDMI devices need an extra configuration step in the HDMI device, to tell it that they are talking to a computer.
The Voltage levels on the Mini Displayport converted to run DVI are sort of marginal. This shows itself as serious problems when trying to run three displays with more than one conversion.
It is possible your display is especially sensitive to the Voltage levels being a bit low. An ACTIVE adapter to DVI may be the solution for you.Mac Pro (Early 2009), Mac OS X (10.6.8), & Server, PPC, & AppleTalk Printers
Currently Being ModeratedFeb 7, 2013 9:41 PM (in response to Grant Bennet-Alder)
Well, the same issues happen with only the one monitor running, so I don't think it's too much conversion going on. I do think you're right about there basically being some missing messages that are needed for the Mac to communicate with the monitor. I'm going to keep working on it. Thanks for your help. Also, I'm assuming by DVI you meant HDMI? If I had a DVI monitor, this would not be an issue at all, lol. DVI has always worked well, problem is I have an HDMI/D-Sub monitor that needs to be my one and only monitor (with possibility of the USB one)....
Currently Being ModeratedFeb 8, 2013 6:32 AM (in response to BrandonScrushy)
DVI-D (the most common Digital implementation) converts directly to HDMI with only swapping the wires around. The Voltage levels and timing are identical.Mac Pro (Early 2009), Mac OS X (10.6.8), & Server, PPC, & AppleTalk Printers